Overall Wii's list is most impressive to me, especially since it has something in all genres.
I'm looking forward to:
Shooter: House of the Dead, Sin & Punishment 2, The Conduit
Action Adventure: Broken Sword, MadWorld, Deadly Creatures
Horror: Cursed Mountain, Fatal Frame IV
J-games: Fragile (!!), Muramasa (!), Arc Rise, Little King's Story, MH3
And that's just what's announced now! People will probably continue to whine about Wii, but the exclusive content looks insane.
Xbox360 doesn't have a lot exclusives for me next year: Alan Wake and Star Ocean, but RE5 will make up for that. And hopefully Mass Effect 2. And maybe I can finally work on the backlog of great games I missed (Fallout/Fable maybe even try Oblivion).
PS3 really misses GT5.