Hmmm I agree that the next Wii will be much more powerfull and better motion technology, even baring in mind that it will be the cheapest on the market, they can still have lots of horsepower under the hood if they put a 500$ engine inside and sell it for 300$ or less.
I also think they should add the Wii Board 2 in it! Why not design the Wii console so that it can replace the Wii board! An internal Wii board, think about it! Remember the N64, it was so strong a car could drive over it and still work. So jumping on a console wouldn't hurt that much hehe.
Perhaps Nintendo comes up with something that is even more revolutionary... who knows. It's all too far ahead to make me feel excited, even SSBB is too far ahead for me already!!!
