I have concrete proof that the Wii is competing with PS3 and 360.
I wanted to buy one console and I bought a Wii and didn't buy a PS3 or 360. If the Wii didn't exist I probably would have bought a 360. So for atleast one consumer they are in competition, although I would imagine there are a lot more consumers out there like me.
@Xiru
Just cause you don't like games doesn't make them not core games. What could possibly be more core than a Mario platformer? Mario Platformers have been core games for 20 years.
^Guy pissing on Microsoft Sign