How will the PS3 do in 2008 when its "big guns" (GT5, MGS, etc.) come out?

[cool48]

120 million people already own a PS2. So in other words 120 million people don't need BC.

Let's say half of them don't want to keep their PS2 or it broke and the other half buys a 40GB PS3 with no BC it could still sell pretty damn well.