I hope not. I like to have the best graphics possible in a given time on a console and if one looks at the graphics of games like Fallout 3, Gears of War, Uncharted, Halo 3, Final Fantasy XIII, GTA IV, MGS 4, Tomb Raider Underground, or Golden Axe Beast Rider. they would look nowhere near as good on the Wii as they do on the 360 or PS3, and placing them on the Wii would dramatically decrease their appeal.
I remember back in my PC Jr. - NES days. I had an NES and the younger kids liked to come over and play games on it, but it wasn't where most of my enjoyment of games came from. I preferred very much the Sierra and Lucas Arts graphic adventures on the Jr. and none of the NES games came anywhere near being as good and quite a bit of that had to do with the PC Jr. games looking so much better.
If the Wii is the rebirth of the NES, I sure hope their next console is much more in line with being the rebirth of the much better in everyway than the NES SNES.