Acording to this article all the wii games at E3 where running on gamecubes.
Source: (also with picture) http://wiinintendo.net/?p=176In this thread, we know that Gamecube hardware was definiely showing Wii games at E3. So will the final graphics be much better than what we saw at E3?
There is a VERY good chance. Someone on here mentioned how much better the Game Informer pics were compared to the pics of Red Steel at E3. The GPU and PPU still aren’t finished, plus the whole design of the Wii.
In another thread someone mentioned why that Iwata didn’t show us a smaller version of the Wii. He did state it would be smaller. That could be the basis behind why they used Gamecubes to display the Wii games. They definitely don’t want to show the REAL Wii system to the public quite just yet, whether it was because it wasn’t complete yet or they are keeping it a surprise. They did show the Wii Console at E3, but it was the same size as the older pics. Plus, we really don’t have the real ATI-specs, possibly due to the redesigning of the console. I mean, if it is going to appear different, then they will probably have to adjust and try to compress all of the adapions into their new system.