interesting thread, but im not so sure I see what your trying to point out, as far as I knew, the next zelda was a GAMECUBE title, that was being released also in a Wii version that had some of the controller functionality. Not a completely new "Wii version" of the game, with better art and everything.
Also, I really dont see what the big deal is about games being run on gamecubes. Is it really hard to believe that nintendo simply overclocked the gamecubes with whatever was necessary to emulate the Wii specs? After all, this is an exhibition show displaying games, not systems. If I were nintendo, and I knew that adjusting a pre-existing system to suit the future generation was on the whole a more reliable way to show off the games being developed, I would absolutely choose to run everything off them rather than the in-development system that Im sure still has plenty of bugs.
Seems like a whole lot of unimaginative tabloid game theroies to me.