There is litterally a 0% chance that the 360 has a chance of even getting 25% of the sales the PS3 does.
However, that doesn't take away from the fact the 360 can do VERY well compared to the first Xbox - which it's going to easily outsell.
I believe PS3 will start doing better in Japan, and eventually get to some decent levels, but only sell around 10-12.5m units LTD - half of what the Wii gets. 360 could end up with around 3m if it's lucky.
Back from the dead, I'm afraid.







