Its the controller that has tapped the market the WII is shears 80% of its internals with a GameCube.
I know that, but what's your point? It uses standardised controllers, it does not allow mouse + keyboard or any other type of controller for that matter (excluding the gamecube controller which is still a pad). It's even more standardised than the PS3! Surely that goes some way towards my argument that people want standardised controllers on their system, not people playing with all sorts of adapters and mouse + kb combinations.