i can't believe that some people are still comparing xbox360 with ps3, but wahtever i don't think that xbox360 will even compete with ps3. xbox360 will just compete with wii.
just everyone look at ps2, 103million unit sold around the world, while just 22 milion unit sold for and 20 million for gamecube. the same thing will happen to these new genrations consloles.
the main reasons that ps3 will be the best console is because most people around the world like sony consoles, maybe people in USA don't like ps3, but USA is not the whole world, most people in asia, middle east and some european countries like ps3 mush more than xbox, and some of them haven't heard of xbox at all. Also, don't forget that ps3 have better and more games than xbox360 (samething for ps2 and xbox). ALso, ps3 will be much powerfull than xbox360.
so, i think that xbox360 will never even touch ps3, i think that ps3 is more likely to compete with PC.
pc>ps3>xbox360>wii
end of story