720p Versus 1080p HDTVs. The Facts

[Alby_da_Wolf]

The higher the resolution, the higher anti-aliasing can low-pass cut spacial frequencies, so the crisper the image remains even avoiding jaggies. So a certain amount of improvement choosig 1080p can be perceived even in limit situations when 720p would be just enough to not distinguish the single pixel.

 

Edit: And interlaced resolutions are generally bad for crispness of not static images.