The only game that I'm going to be buying for sure is Wii Sports 2. I will probably buy NBA Live or 2K10 if either one is decent (75+) and supports Motion+. And I'm interested in the EA Tennis game, which I'll buy if I get a job (supplying the money).
# of games above 75 on Metacritic (including downloadable):
360: 241 DS: 144
PS3: 152 PSP: 126
Wii: 85