No consumer? Well, I can't speak for the billions of other consumers out there but the 55" 4K Sony TV I saw was stunningly sharper than any HDTV I've every seen. But here is the rub -- I didn't know it was 4K when I saw it. It captured my attention in the store, but I thought it was just a top of the line set. A salesperson came up to me and told me it was 4K.
Is 4K delivery necessary? Probably not. HD wasn't necessary either. Heck how many people are still happily watching DVDs on their HD set! If color TV was never invented we'd likely still be satisfied with B&W. And if B&W TV never came to fruition we'd all be listening to radio shows like in the 1920s-40s. Such is the nature of technology and human adaptation.
Honestly, most TV is cr@p regardless of resolution. But I sure would love to see sports in 4K.
Oh boy. Someone had too many snob pills this A.M. Do you remember how massive tube TVs use to be, and then rear projections were even bigger. 70" flat screens are miniature by comparison. People have room for them and will by them if price is right and there is sports content in 4K.
BTW I live just outside DC and homes near DC are a lot smaller than ones in the burbs. Land is expensive close in so homes get smaller.
Unless you were standing less than 6 feet away there is no way you were noticing the pixels.
The average viewing distance is 7-10 feet.
At average viewing distances there is no perceptible difference between HD and 4k on a TV under 70 inches.