My eyes are fine so yes; I can tell the difference between 720p and 1080p.
Does it matter to me? Yes. That's why I started playing multi platform games on PC back in 2008.
Can I tell the difference between 720p on PS3 games and 1080p on the PS4? Do I even need to dignify that with an answer?
If anyone answers no, I can only assume their viewing distance to size of display ratio is outside of the range of what healthy human eyes can distinguish. Pull back far enough from any size display, and an upscaled SD 480p image will look just like a native 4k image on the same display once far enough out of the range of normal viewing distance.
At about 5" (60") distance, I can distinguish pixels on a 50" HDTV, so it becomes very apparent whether I'm looking at a 480, 720 or 1080 native resolution image. On a 1920x1080 computer display at normal typing distances (about 15"), anything other than a native 1920x1080 image or signal is quite obvious.
So either fix that corrective lens prescription, or move closer to the display if you genuinely can't see the difference.







