I know what I can and can't see. Maybe you have poor vision, I really don't know. I am 100% sure anyone else who has had both or worked with both will tell you the same, it is easily noticeable; poor vision aside.

So you're trying to say that, while sitting about 2-3 feet away from a 27" 1080p monitor, you can SEE the pixels? You can see them all lined up, all the divisions between the pixels? I could see maybe saying you can see the pixels, when in fact you're seeing things that are designated to be one pixel high or wide... like the majority of the borders on this and most websites. But to say you can see each and every pixel is complete and utter BS. If that's the case, you probably have to sit several YARDS away from any large TV if it's not 4K in order to be satisfied. It's not even a matter of "good or poor vision". For that to be possible, you'd have to basically have magnified vision. ESPECIALLY if you're talking about something OTHER than web browsing, like gaming or watching movies.

Maybe if you're looking at, say, the dotted line between your post and where it says you edited your post.... or if you're looking at something that has a designated corner.... but to say you can see the pixels from a normal sitting distance on a 27" 1080p screen is just as bad as people saying they can SEE the difference between like 90hz and 120hz.

What are you talking about, the difference is very easy to see... Here's a hint, yes you can discern between the pixels. Things will appear blocky unless you have high enough PPI that you are unable to resolve pixels. We're not there on the desktop side yet. 90Hz and 120Hz? You must be just joking now. I can easily see the difference between 96Hz and 110Hz. Let alone 90Hz and 120Hz.