Seriously how do you know that? I mean how do you know for sure what changes nintendo made with the Wii and speak it as gospel?
fallacy...
Wii has been on the market just about 2 years now.
Certainly by now, even the secrecy of Nintendo would not stop information from coming out about Wii's chipset architecture, *IF* it had been anything much more than a faster GCN chipset. Use your brain, use some common sense.
The small die sizes combined with the very low power consumption rule out any significant additional transistors that you would have to have if there were more execution units, pipelines, rendering functions, etc.
Most of us have accepted that Wii is really no more than a 1.5x faster GameCube, with a relatively large increase in the amount of fast RAM (about 3.5x more). Now tech-enthusiasts are trying to find out what Nintendo is putting into its next-gen Wii 2 / Wii HD. If you're interested in a new architecture, more power, more features, etc as far as a Nintendo console's CPU & GPU,
the next-gen Wii is where the hope is, not the current Wii. Sorry, but that's basicly where things stand.
Do you really, actually think, at this point in time 2 years after Wii's release, that some shocking revalation is going to come forth that shows Wii's CPU & GPU have anything significantly beyond GCN ?