No, Xbox has largest market share in the gamer community period, with > 25 million units shipped worldwide. And they will be profitable overall on their gaming unit by the time this console generation is over (2015?).

Nintendo is operating in a different market. They are a toy company, first and foremost. And it's better, conceptually, to think about the Wii and DS as toys. They have a completely different audience - and completely different revenue model. People buy toys for a short-term entertainment value, or novelty - and then the novelty wears off.

This describes the Wii exactly - people buy one, they play a game or two, or maybe Wii fit, and that's it. You aren't seeing serious time spent with it - and the tie ratio demonstrates that.

BTW - I think I'd classify Guitar Hero / Rock Band as toys, too. Hence the horrible sales numbers this season - people are sick of this particular kind of toy.