Ouch, the PS3 version is very rough graphically. It's quite nice indoors, but outdoors... . Jaggyfest, lower quality textures. Not too impressed.
I've seen people say that this game really shows that consoles are starting to show their age and that the PC has really taken over now but I disagree.
Imo, this game is just not really optimized well for consoles. Look at what Uncharted 2 on the PS3 does, or hell even Red Dead Redemption on the 360. Both games are so crisp, sharp, high res textures etc.
IF devs really put a lot of effort in the graphics department of their game on a console then some really stunning stuff can be achieved.