I was at BestBuy yesterday with a friend (laptop shopping).... I wandered through the TV section and was looking at the 4K Tvs. With a 50 inch set, the difference between 4K and 2K was certainly noticeable. According to the sales person, 3D tevivisions do not sell as well as 4K, but 2K is still the big seller.I hope so! Just got the new Dell 24" UHD display and checked out some 4k videos clips. Whoa!!!! Out of this world! So awesome!
And yes that means all those downers who insist that 4k is just marketing nonsense hype unless you run 90" or larger HAVE LESS THAN ZERO CLUE. The difference is perfectly clear on my 24" monitor between 1080p and UHD video and it can be striking at times!
(And of course UHD is AWESOME for photos! They look so much more natural, like giant project slides or something without all the digital artifacts and pixels and such type look on 1200p or lower displays and the extra details really make things look so much more realistic.)
(Oh and text! Man the web looks SOOO much better since all the text now looks like a printed page!)
The 90" size is for TVs, not computer screens. And the best size for a TV really depends on how far your couch is from the screen. There certainly is no requirement that you have an 80" or larger screen, and in some cases a 46" or 50" screen may be a lot better for your setup. Regardless, the point is to double the pixel density at whatever your viewing distance is. If you currently sit 12 feet from your 60" 1080p TV, then getting a 60" UHD TV would be absolutely incredible!
As far as a Dell 24" UHD goes, I would be willing to bet it is no more than three feet from your face, and likely closer than that.
You don't need a 90" TV to see the difference, it will be obvious even on a 40" TV at normal viewing distance. Especially in any sort of scene with large amounts of small detail, such as vegetation. The limitations of current 1080p footage is quite clear on a 40" screen.
But, among the 4K TV buyers, 4K video will be absolutely important. You, know, the high end high margin customers that make manufacturers bucket loads of profit margins.
And, in any case, todays high end 4K will be tomorrows standard fare, while 2K will go the way of 720p. When 2K sets first appeared at the high end, people said the exact same thing, that you can't tell the difference. Well, you CAN tell the difference, and how many 720p sets are on the market now? Very few, all at the absolute low end non name brand junk market.
Some people seem to think that profit is unimportant to manufacturers. I disagree.