Xbox is irrelevant in Japan, so whatever bad decision Sony makes it will always lead by a healthy margin in this region. I'm not sure but I have the impression we can extend this to the rest of Asia

And it's also far more popular in Europe, even Xbox 360 sold about ~70% of PS3 and Wii

The only market they are really fighting is America, both Anglo-America and Latin-America (which is a small market for console gaming relatively speaking). So the only hope for Microsoft to outsell Sony is to CRUSH Playstation in North America, which is not an easy feat