Lot of people are talking about FarCry 2, but to me, it's looking like and probably will be Crysis2.0, visually I mean, it won't be that much more amazing i don't think, but the gameplay looks awesome.
What you should look forward to is definitely Alan Wake.
And Battlefield 3: Bad Company, of course, can't think of other ones that are astounding as far as graphics are concerned.
oh and Starwars the Force Unleashed. not so much graphics, but the detail in destructibility looks absolutely incredible search YouTube for "digital molecular matter"