MS doesn't 'need' to do anything in the US, the console war is already over in the US.
Wii will surpass it soon and Sony lacks the momentum to catch up, 360 is a guarenteed 2nd place as long as 360 production doesn't cease for any protracted length of time.
Worldwide is another matter, I'm sure the gap will close by January 2010, but it depends on how much. If MS is 5 million ahead by 2009, 2 million ahead by 2010 all they need do is release Xbox 3 for Holiday 2010 and effectively they held back Playstation 3 for a whole generation.
Userbase would be about the same, but MS will have made loads of gains in 'others' (5 million sales this year according to analysts) former PS3 exclusives (MGS4, Final Fantasy XIII) and have made a ****-ton of money on XBL subscriptions. Get another year head start and Sony won't be catching up again.







