There is a definite commercial argument that encourages publishers to re-release many PS2/Xbox titles on the Wii - with minimal upgrades. Most time will be spent working on control systems. As a result, I think there will be a lot of "sloppy" Wii ports - esp. in first year or two. Bigger budget Wii titles won't suffer from this at all - I think Wii Sports looks fantastic, as does most of Rayman, etc.
Gesta Non Verba
Nocturnal is helping companies get cheaper game ratings in Australia:
Wii code: 2263 4706 2910 1099