Sales drive revenue. Revenue drives profit. Profit is a major driver of share price and shareholder value. Share price and shareholder value determine whether a public company thrives, survives, or fails.
Betamax was better quality than VHS. VHS sold better. Betamax failed and was abandoned.
On a more DSLR related note, Olympus came out with 4/3 format. It was going to be a worldwide standard. Many things about thier cameras were ahead of what the Canon and Nikon crop bodies offered at the time. They had beter user interface, beter weatherproofing, arguably better sensor performance, and faster autofocusing..... and where is it now? ( 4/3... not micro 4/3 ). Sales sucked, product not stocked by retail stores, death spiral, gone.
Well, the Olympus E5 got a DxOMark Overall Score of only 56. That must be why it didn't sell.
Personally, I've never paid a lot of attention to Dx0Mark scores. A lot of people fixate on sensors, but it seems far more important to deal with more important stuff first. I tend to shoot in good lighting conditions so I don't have a fanatical worry about ISO scores.
To me, the most important aspect of a camera system is the AF system. An in focus picture beats an out of focus picture. I don't care how much dynamic range or megapixels are involved.... Focus is of paramount importance.
My second criteria to look at is the glass. It does not matter if you are shooting anything from a rebel to a 1Dx, the resolution of the glass has to exceed the resolution of the body if you are going to push things to the limit. With the higher pixel density, this is far more important on crop bodies than FF bodies, but when a high megapixel FF body comes out, make sure you have top notch glass of you will get soft pictures. Stick a 100L Macro on a Rebel and it will take pictures so sharp it will amaze you.... put a $200 kit zoom on a rebel and you get mush.
My third criteria is good user interface.... gotta be able to control things on the fly and in a panic.... stepping through menus does not cut it.
New sensor? Yes it's important to me, but it is far from being everything to me. I use camera systems, not components in isolation. It is very important to me that whatever system I am using comes from a stable and profitable company. If they are loosing money, they run the risk of going away, and that leaves me with a shelf of orphan glass.
As always, the greatest image quality will quickly be negated by focusing errors. AF accuracy is extremely important for the the combination of DSLR and the lens in use - especially AI Servo AF accuracy.
And not to forget especially with a shallow DOF (Depth of Field), even small focusing errors will ruin the shot.
Also - if you need to use a Extender with your lens - Canon has stated this: " "These new extenders (version III) have been designed to provide faster autofocusing and improved autofocus precision with compatible EF lenses" and "Each extender also features a newly developed microcomputer that increases AF precision when the extenders are used with a IS Series II EF super-telephoto lens." [Canon USA]
So then - we should bear in mind that the Canon USA press release does not specifically say that the series III extenders would deliver better image quality (though features were added that could) - but that they would deliver better AF performance.
- Although the AF improvement will not result in better than the optical capability of the lens-plus-extender combination, better AF performance does indeed deliver better image quality overall and that is crucial!
Happy shootings to you all!