Here are some 'pixel perfect' screens.

The graphics are great in current-gen standards, and games like Super Mario Galaxy, Red Steel, Rayman and Sonic looks "next gen".

And the games that don't look good have the Wii backing it up 100%.

And here are 'pixel perfect' Gamecube launch game screens.

Some games can be compared to Wii, but most aren't even close.

But graphics don't matter as long as gameplay is good.