Re: Waste of time and money, you can't break the rules of biology.
"uoted in diagonal size appears to be screen sizes for marketing purposes). Using Pythagoras' theorem, a square pixel of 0.56mm would actually have a diagonal size of slightly under 0.8mm, but lets not split hairs here."
WRONG AGAIN! Yes a square pixel of 0.56mm would be < 0.8 but your original calculation of 0.56mm was wrong (FHD = 1920x1080). I did compound the error by typing 0.9mm instead of 0.8mm but that's finger trouble for you. The diagonal dimension is what your eye will be able to detect unless of course you have CCDs for eyes that are perfectly aligned with the display.
I can think of quite a few things that have distinct edges on TV programs that I watch, like people, houses, plants, in fact I'm really struggling to figure out what it is that you watch that doesn't contain any high-contrast edges.
Anti-aliasing is a work-around for poor resolution, ask any gamer who has a QHD or better screen whether they actually keep anti-aliasing turned on.