"A lot of people, including myself, don’t think 4K will even become a mainstream thing inside peoples homes. The size of screen you’d need to see the difference between 4K and 1080P in your home would eliminate most potential customers. Think of it like a 1080P vs 720P 32″ television, there’s just no discernible difference when viewing 1080P content."
Said by the person who doesn't sound like they have seen 4K displays showing true 4k material (even though you seemingly have). The whole you need THIS CRAZY big sized screen tell even notice 1080P or even 720P stuff was always just nonsense too, some of it pushed by TV makers wanting people to sit VERY far back so all sorts of screen defects wouldn't get complained about as much. Look at the distance you can sit in a movie theater or THX recommended distances for home, it's a far cry from TV manufacturer recommended viewing distances (and even at those it doesn't exactly look like looking out a window does it?)! Plus 4k vs 2k is 4x the pixel while 1080p vs 720p is 2x the pixels.
Just think about this, 24" 1920x1200 monitor, running a game, turn off AA and does it look pretty much the same? Or like a jaggy, aliased garbage? How could it look jaggy at 1920x1200 if you can't even tell 1920x720p from 1920x1080p? Look at your HDTV showing 2K and then look outside the windows, BIG difference no (even with one eye closed to eliminate stereo vision)?
2K looks good but it does NOT look like you are there crisp by any means.
Just look at how vastly better a retina iPad looks than the older iPads or lower res tablets. It is night and day. And even with the retina iPads you can still see a touch of jaggies!
After using a retina iPad for a bit then go back to your 1920x1200 24" PC monitor and holy cow does it look like a blocky, grainy mess! THAT shows you how far off 2K is from where vision can go.
In just a year 4k sets already dropped from $20,000 to $4,000. Don't forget that just like maybe 8 years ago a 52" 2K set cost like $10,000 at best and look at what you can get one for now.
Sure it will take time to get lots of 4k content out there but it will arrive in time and why not revel in your own footage or have footage fully future proof if you can manage it?
Compare a 13x19" print next to the view of the same image on a 19" monitor from typical monitor viewing distance and tell me you can't see that the print shows a lot more details.
A lot of cams that do 2k also either give a sharp but digital look or a blurry soft not really 2k resolved look even when putting out to 2k displays.