It looks about the same for me except the fact that WinUAE better centers the display. (there is something funny going on with my miggy
I connect my laptop to the TV and I don't see much difference.
You can make actually WinUAE look even better then on real hardware, but I don't see why is that a problem?!
Real amiga didn't intentionally have HD installs for the games, so I assume none of you 'like to get perfect feel' uses WHDLoad either. Same goes for speed up drive speed and rest of WinUAE added options...