Wii didn't have core gamers in the first place.
It's a console designed first and foremost for casual players, that was the whole concept of the machine. That's also why Nintendo didn't give a hoot about things like expandable storage (love dat fridge) or online networking on the system, because it wasn't relevant to their main demographic on the machine.
Sony took that audience from Nintendo basically with the Playstation 1, now MS and Sony have basically divided it in half and Nintendo is trying to find their own audience now that casuals have abandoned the Wii brand.







