My prediction on what nintendos next console will be like.

[Grey Acumen]

The next Wii console will use a controller style that is much like current Wiimote, but moreso. The speaker quality will be improved, it will have dual accelerometers to better calculate it's movement, it will have an upgraded camera that can be used similar to how the PSeye works on top of sensing infrared points. The B button will be able to sense pressure, much like how the R and L button worked on the gamecube controller.
The nunchuk will have a microphone built into it, taking the place of where the c button is on the current nunchuk. The C button will be below the Z button, making it easier to press with the middle finger, and will essentially be a mouse wheel turned sideways so you can roll or click it. the Z button will be pressure sensitive much how the B button is on the updated Wiimote. The nunchuck will also have rumble capability.

Of course, the Wii will obviously be updated, probably not quite up to the level of PS3 or 360, but close enough, depending on how cheap the the various electronics have come down. The most important issue is that the NuWii(New Wii) will be backwards compatible with ALL Wii controllers (wii remote, classic controller, balance board, etc) and will be able to play the entire library of Wii games. Many NuWii games will even take advantage of the ability to use the old Wii remotes if you want to have a multiplayer game, but don't have enough NuWiimotes for everyone.