Reggie wants Little Big Planet, Halo, Bioshock on Wii

[Bodhesatva]

I said it before, and Squirrel just said it again, but a large portion of "diversity" comes from being the most popular.

Each platform seems to have its own style and particular audience, now. Even when a platform does get a game that is outside its usual audience (such as Madden on Wii or Okami on PS2) those games tend to sell much less well than you might predict (as both of those games did). 

Another great example is Viva Pinata. That game sold 300k+ copies, sure, but given the advertising and quality fo the game, most people tend to agree that this total represents substantially less copies than it might have sold on another platform, especially a Nintendo one. That's probably true. I'd guess that Manhunt 2 (which isn't out yet -- I'm just hypothesizing) would have done better on the 360 than it will on the Wii, but that's just a guess.

Every platform has a general audience with generally similar tastes. Lots of exceptions, certainly, but generally, true.