The 360 has the highest games-to-console attach rate of any system ever. If repeat buyers are a significant portion of 360 sales then the 360's attach rate would be absolutely insane. Therefore it's easy to reason that broken consoles make up a very small percentage of total units sold.

Playing devils advocate they are locked-in to a 7+ year old platform. A fact I've heard being lamented a lot lately.

I would imagine there would be a lot of gamers that like the idea of newer tech / concepts and would get the Wii U.

That said, the Wii U controls are just... odd.