There really isn't much of a reason to buy a PS3 over an XBox 360 this year (in North America or Europe) being that the XBox 360 has a much larger and better library, and the better exclusive games released within striking distance of the holiday season. At this point, the only reasons some one would choose a PS3 over the XBox 360 is they're a Sony Fanboy, they are really looking for a Blu-Ray player, or they're uninformed. For this reason I expect the PS3 to sell really poorly and only sell 2 to 3 million units worldwide over the holiday season; thus they will be sitting between 7 and 8 Million units sold wordwide as of January 1st 2008.
In 2008 I expect Sony to average 500,000 units per month sold wordwide for the first 6 months and thus to hit 11 Million units sold in May or June 2008.
