What has been the Defining/Most Hyped game for each System this Generation?

[Parokki]

Make up your mind. First you ask about the most hyped game, and then the one that will be remembered as the best. Totally different things. =P

Wii: Galaxy or Brawl
360: Halo 3, no contest
PS3: MGS4 or FF13
360+PS3: GTA4