I think Nintendo should wait to see what Sony's going to bring out and copy them instead! LOL. Sorry, I couldn't resist.
I believe we'll see modest improvements. My wish list includes location/orientation sensors that work without the bar, rechargable batteries that charge with your own movement and/or a power source, a grip on the underside of the unit and an analog trigger. I'd also like to see the Wii 2 be able to handle more than four Wiimotes at a time.
Beyond that, it would be nice to have a mini screen similar to the Dreamcast with its VMU. (I'm surprised no one's done something like that since.)
Numbers are like people. Torture them enough and you can get them to say anything you want.
VGChartz Resident Thread Killer