How does the Wii have "last-gen" graphics...?

[Yuk04]

This is a quote from Eurogamer reviewer about Super Mario Galaxy Preview

http://www.eurogamer.net/article.php?article_id=81578

"This is not just the best-looking Wii title by miles, it's one of the best-looking games in the world full stop, HD or no HD. It's as smooth and shiny as silk, the colours are unbelievably vibrant, it's smothered in lustrous effects, and you feel like you can reach out and touch its chunky, cute and tactile designs. Super Mario Galaxy makes most hi-def games look about as solid and convincing as photographs pasted onto empty cereal packets."