Apart from the obvious inclusion of Motion+ compatability, there could be other changes to the gameplay mechanics as well, such as camera, to register body movement better, and perhaps the inclusion of those weights that you could put the wiimote and nunchuck in to effectively turn them into decent dumbbells. It’s especially the last addition that would have me interested in Wii Fit Plus.

Again, I’m pretty sure the new version of the software/game wont require you to buy a completely new balanceboard. We’ll see in a short while exactly what it is.