[epimetheus]

I'm not that old, but not super young either (38), and I can definitely tell a difference, I rented some movie on DVD instead of blu-ray and it was pretty horrendous. I try to watch SD on my TV and it's horrible. Granted, the difference between SD and 1080p is probably much more remarkable, but we have a 40" 1080p after having upgraded from a 28" 720p TV (I know, small) and I remember how going from SD to 720p was pretty amazing (got an Xbox 360 at the time, and playing some of those games were jaw dropping). When we upgraded to 1080p I was skeptical, but I was quickly a convert.

4k, I'm skeptical of, 8k, definitely; unless it's some weird 3D benefit (4k "in each eye" type of thing).

My parents got a new 55inch UHD (4k) TV and rave about it. It looks... remarkably different, but I'm not sure it's the resolution or the increased refresh rate. I don't think I like it, it "up-regulates" 1080p movies, and makes movement jerky or something is just off.

I'll stick with my 1080p for now. That said, I notice watching movies on my Retina Screen (mac) that movies from netflix are a bit higher resolution, though not 4k. It's noticeable for me even at that slight difference, though to be honest, I put the same show on both my TV and my laptop and place them so the screens are comparable size/distance and the difference is there.

[vitriol83]

i don't doubt for a minute that people can tell the difference. however would just make the point that a proper controlled experiment would be to change the source from 720p to 1080p or 4k, rather than the tv (assuming the tv supports the maximum res!).