Hm, when I look at an image like that (couldn’t find one, so I created a couple in photoshop), I can see the separate lines from quite a bit further away.
I guess I was talking about the distance at which I can no longer see the grid between the pixels when looking at an amorphous uniform field of the same color, which is quite a different matter and is what I find irritating and especially visible on bright areas - like when I saw a 2K digital projection of the Hateful Eight, all the snow scenes looked like I was watching them through a mosquito net.