Considering realistic styled graphics; The Last of Us > God of War Ascension > Uncharted 3.
Of what I played anyway, I assume something like Gran Turismo 6 looks pretty good as well. I think GTA doesn’t look good at all. Though I haven’t played much unrealistic looking games on PS3, I’m also not really considering them because those kind of looks are a whole different ballgame.
GT6 probably have the better look and most realistic one of all the list. But cars are somewhat rigid and simpler to portray than humans. The uncanny valley is less likely (we even were impressed with GT1 on PS1), textures are simpler to get than human skin, pores, fur, etc. Also it have less moving objects on screen at any given time, most of stuff is reasonably far from view.
Several stuff make it a little easier to achieve photorealism on racing simulator than on an action game.