IF the Wii wipes out the floor with the competition then we wont see anything more powerful .All the companies will try to bring the least powerful an cheaper console and flood it with remakes of old games and casual games to "win " at the Wii style .
Naw i'm pretty sure that when/if the Wii wipes the floor with the competition, the next gen would be around 360 graphics becuase i'm pretty sure that kind of power would be cheap like Wii by then. If Blu-Ray somhow becomes cheap however, i'd expect them all to use that. No one is going to move backwards in power/graphics. All companies are moving forward.
And who knows, maybe by some miracle of science we'd be able to harness the power of Ultra Violet rays to use instead of Blue rays.
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