PS3 games win because of graphical art I think, not because of graphical tech.
Most PS3 games have great graphical art.
All PC games have technically superior graphics, but some are let down by bad art.
Looks like the upcoming PC games like Reset would have superior technical graphics and superior art too!

---------- Post added at 05:33 AM ---------- Previous post was at 05:31 AM ----------
I would guarantee you that PC will give 3x the graphics of the same multiplatform game being played on the consoles.
I am still not sure why console games win over PC games.
Maybe graphics of only exclusive games are matched in awards.