You are still assuming everything else is equal, such as subject size in frame.
A simple example here would be in a reach-limited scenario. If you are physically incapable of getting closer to your subject, and cannot user a longer lens, then a sensor with smaller pixels is the solution. MFD sensors are large, and have large pixels. Increasingly, their pixels are 2x the size of a FF sensor, and even larger than the pixels found in APS-C sensors. That means you can't put as many pixels on subject with the MFD, so either a FF or an APS-C DSLR sensor is going to be better...it'll put more pixels on subject, and assuming you use a lens with a similar entrance pupil, you'll achieve the same S/N. Focal length doesn't even necessarily matter in this scenario....entrance pupil size, exposure time, and # of pixels on subject are all that really matter to normalize S/N across sensors regardless of sensor dimensions or pixel pitch.
So your assertion that MFD is and always will be better is ignoring some of the facts. I'm trying to point out that you CAN get results just as good, if not better, with a physically smaller sensor with physically smaller pixels. The reason for this is Etendue. Roger Clark clearly, mathematically and visually, demonstrates how and why the 7D can and is better in many situations than a 1D IV (APS-H) or 5D II (FF). Just because a sensor is 44x33mm in size doesn't mean it is magically excluded from the facts.
Your contorting your argument to make it sound as though MFD sensors always have more pixels, which is not actually the case. Hassy has a 30mp MFD, which is actually FEWER pixels than the D800's 36.3mp. In just about every scenario, the D800 will outperform the 30mp Hassy MFD, and not necessarily because of the improved DR. Because it is easier to bet pixels on subject, and because there are lenses that exist for DSLR that have immense physical apertures (such as a 300mm f/2.8 or 500mm f/4). The best thing Hasselblad has to offer in their H-system is a 300mm f/4.5. Lets even assume you use a H4D-50 (btw, H4D-200ms is still actually a 50mp sensor, it just integrates their "multi-shot" technology...you could achieve the same results with a pano rig or a Tilt/Shift lens and a normal DSLR) with the 300mm f/4.5, and compare it to a D800 with a 300mm f/2.8. The hassy has 6 micron pixels, where as the D800 has 4.6 micron pixels. If you shoot the same scene from the same distance, the D800 is going to take the upper hand here every time (even ignoring its better DR). Smaller pixels, larger physical aperture, more light on the sensor, higher S/N for that particular exposure for a greater number of pixels on subject. If you stop the D800 down to f/4.5, it will still win out because it puts more pixels on subject, even though the two exposures will have the same S/N.
I'm not saying medium-format cameras are not awesome cameras. They most certainly are, and when used for the things they were designed to be used for, such as studio photography where there is nothing to limit you from putting as many pixels on subject as possible (fill the frame), they can and will produce stellar IQ. Assuming you use a MFD with more pixels than a comparable DSLR (i.e. you use a 40, 50, 60, or 80 megapixel MFD), and fill the frame, then yes, MFD will also outperform 35mm. On the flip side, you need to acknowledge that there are situations where 35mm FF or even APS-C DSLR's are the FAR better tool for the job, and they can produce better IQ for those kinds of work than a medium-format digital camera could ever hope to aspire to.
We're not discussing about limited reach, we're not discussing 35mm's versatility and we're not discussing the impracticality of the MF system, or the extreme im-practicality of a 4x5 view camera.
Well, no...my reply to you was in regards to the finality in your argument, the "simply fact" statements. Which is demonstrably NOT true, and I've linked external resources that provide the theory that explains why.
We are discussing the resolving power of two different formats. 35mm & MF.
You can't say 35mm resolves more that MF. It simply doesn't and never will.
That's plain and simply untrue. A D800 sensor, from a spatial resolution standpoint, resolves more than a 40mp, 50mp, or 60mp Hasselblad. All three of those sensors are different dimensions, and all three of them have 6 micron pixels. The D800 has 4.6 micron pixels. A 7D has 4.3 micron pixels. A D3200 has 3.8 micron pixels. From a spatial resolution standpoint, all three of those cameras "out resolve" all of the hasselblad sensors. You might be able to put more pixels on subject with a hassy, but spatially, you aren't resolving more, you are just recording an image of a greater physical area. Different things. For the kinds of scenes you photograph with a MFD, you could just slap a T/S lens on a D800 and in a few seconds a set of six photos that can be stitched together to make a photo around 250-300mp (same exact thing the H4D-200MS does...only with MORE resolution.)
Likewise, You won't see anyone go shoot a motorsports race with a MF camera. It's just not practical. I'm not saying 35mm has its place, It does and thats why Photojournalists aren't using garraflexes anymore. I feel 22MP is more than enough for 35mm. It can make great 24x36 prints.
Your contradicting your own statements here. As I indicated above, FF and APS-C DSLR's can and do "resolve" more detail than a medium format. They are also far better suited to many forms of photography, and in many cases just as capable as a MFD in other types of photography. You absolutest statements about MFD being unbeatable period forever and ever are falling apart here.
But when push comes to shove, NO 35mm system will ever resolve more than larger formats MF or LF. Period. End of Story. Its Fact.
You need to properly qualify that statement with "when MF has more total pixels." You are also assuming that 35mm will never have as many pixels as MDF...that is just an assumption. There are prototypical sensors that pack FAR more pixels into FF and APS-H sensor area, with higher readout rates than any comparable MFD sensor. Technologically speaking, DSLR sensors could make some even more significant leaps (above and beyond what Sony Exmor has done) past anything MFD has so far provided, or might provide in the same timeframe. So stating "Period. End of Story. Its Fact." is also simply an anecdote, an assumption...and therefor not a fact.
A d800 only has 36MP. The Phase One IQ 180 Has 80MP. They're is no competition. When 35mm jumps to 46MP, MF will be in the 120-160MP range. 35mm will never catch MF.
The Phase One has more resolving power, not only because of its MP count but because since the magnification is lower on the lenses, They are sharper. Any imperfections on the higher magnification 35mm lens will be shown more clearly, while I had a Hasselblad 501CM with a beat-up scratched lens that still was sharper than any of my 35mm canon's.
MF will always have more detail and resolve better than 35mm.
Edit: Infact Imagine this. Take a full Size 36MP file from a d800. I take the 80MP Phase One file and downsize it to the d800's 36MP size image. Which File will be sharper, have more detail, and better resolution Eh?