OHH!!! I just thought...VI for Wii!? Okami style Wiimote use for the same things we're talking about...
But then...no they wouldn't do something that cool...
I suppose they probably want to keep things portable. Grrrr. But imagine the level of graphics they could accomplish, and they wouldn't have to worry about what could fit on the card!

But se la ve, it won't happen. *sigh*