Well the PS3 was argueably always mor powerful, only that not one dev team had any way to show it. FF13 is a really good showcase of what the system can do, and it probably will end all speculation on the subject. The question is, is the system so much more powerful than the xbox360 that any given(or the majority of them) developer can prove it with their games? It seems not as most games on the PS3 that are high end are also coming to the xbox, except of course for some of the exclusive titles.
Deep into the darkness pearing
Long i stood there
Wondering
Fearing
Doubting.