People said exactly the same thing about the DS' touch screen. And what happened? There are now loads of kick-arse games that could not have been created for any other console. And developers are only just scratching the surface of the possibilities.
EDIT: Oh, and this.
It's not just innovation for the sake of innovation. It's noticing that the games industry is groaning under the weight of its own stagnation. Name five truly original games that have come out in the last year. I don't think you can. Now try this again in another year and I guarantee that at least four of the five will have been on the Wii.