[calciphus]

I've set a Nexus, SGS3, iPhone4S and iPad3 all next to each other. Unless your eyes are truly fantastic or you're viewing an image designed to show off one or the other's exact display, you'll not notice the difference. At 300+ ppi (on all those displays) you're probably never going to notice a difference. Color quality, saturation, viewing angle? Those all matter far more than the sub-pixel arrangement. Just go look at an S3 or Nexus in the store and see if you like it.

Bona fides: I own an S1, S3, iPodTouch(2G), iPad3, GalaxyTab10.1 and Galaxy7. I work for a company that develops mobile apps and it's my job to know about these devices.