Followup to my other thread.

http://gamrconnect.vgchartz.com/thread.php?id=196868

I can tell pretty easily (I can USUALLY tell the difference between 900p and 1080p), but some people claim to not notice a difference.

Results so far:

In motion I can see the difference between 720p and 1080p...

900p vs 1080p, no, and most of people would be wrong in 50% of time.

But, in the end of the day, I don't care at all.

Despite suffering from myopia I can clearly tell the difference between 720p and 1080p.

I think I'll just copy paste this.

Everyone can. Those who say they can't never honestly tried or are lying.

Yep. When I played GTA 5 on my PS4 for the first time, the first thing that I noticed was the upgraded resolution.

Easily, and everyone who can't needs glasses. 900p with a good upscaling is noticeable too with a better inspection. 720p is easily noticeable, even with good upscalers.

720p and 1080p is a clear difference. Especially on a PC the extra real estate is almost impossible to not notice. Even on smartphones at that pixel density there is no improvement in visual quality but the extra room for smaller things is great.

I understand those who can't see the difference between 900p and 1080p but it's still there and clear (at least to me)

Yup

Usually I do not notice it, probably because I do not really care.

I believe that if I would focus, I would notice it.

Yes, non native display res always stands out.
1080p vs 720p makes a big difference for racing games where you focus on a small part of the screen looking at the road in the distance. For open world games it adds extra immersion being able to see further. For platformers, no advantage, but looks nicer when it's not upscaled.