The new controller for Nintendo's next console is a neat idea, and seems like an important part of Nintendo's strategy. Like the GameBoy DS, new standard controllers potentially mean completely new styles of games and gameplay, if not new genres. And with Nintendo itself developing these new games, it'll happen, even if not right away.

Not that I own a GameBoy DS.

(Some are calling the GameCube a failure, I guess in a business or technological sense, since almost all of its quality titles were developed by Nintendo, and not third-party game companies. I'd say the GameCube is worth owning just for the Nintendo titles.)