The main thing that worries me about the Wii is that it doesn't encourage advances in Gaming as an art form, in fact, I think it actively discourages it.
I love games and I think long and hard about game design etc, study story telling in games in detail... what I am absolutely don't care about at all is diferring Input Devices.
I mean, who cares if the line of code reads:
if WiimoteSwung() then HitBall()
if ButtonPressed() then HitBall()
The really good games come out at the end of hardware generations, normally on the console that has blatantly won. See - Shadow of The Colossus, Okami, FFXII, GoW II, etc etc... It's when people aren't wowed by graphics, or different controls or online and stuff, so game makers are forced to innovate and advance the actual medium, ie. the software.
I mean, when they sat around the write the design document for Shadow of the Colossus, did they say:
"Right, we want to tell a bittersweet story with a theme of isolation"
or
"Oh my god, we could have like the Analogue stick to move!"
---
Kudos to Mario Galaxy and Smash Bros, for pretty much completely ignoring the Wiimote and it's special abilities, because it added nothing to their Game Design.
-= Out here in the fields, I fight for my meals =-