How exactly do you explain last gen then?I am not convinced. And besides that, I'd argue it doesnt matter all that much.
Imagine Wii was 50, 75% more powerful than it was in reality. Would it have garnered more 3rd party support? I'd argue, not really.
I used to argue Nintendo should have equipped Wii with a X1600XT GPU. A nice, very featured, fast, cheap, GPU of the time, that would have ran circles around Hollywood, but still not challenged RSX/Xenos. But I have to admit in my heart of hearts, I realized it probably would have made no difference except cost Nintendo more money.
You need to be in the ballpark. Even a modest 30% less powerful is probably a death sentence imo.
Or PCs?
Heck some would argue ps3 is that much more powerful than 360.