^FK
Last year, xbox had a pricecut right before the holiday season, therefore it sold much more than ps3
This year, Sony will most likely be getting a slim and pricecut, as it hasnt had one in a large while. If xbox has a cut as well, I don't think it will be that huge of an impact (as the large pricecut was last year). Even if X360 announces a slim, then the strategy would be the same for both consoles, but then again, Japan gets FFXIII which will be a large boost for PS3 (at least an extra 100k in the holidays), as well as a probable GT5. These will be bigger HW pushers compared to ODST and forza 3.
IMO
best case scenario for Xbox: 9-9.5 million gap max
Worst case scenario: 7 million gap








