Well Sin and Da Mole have said the PS3 Slim is real and the track record for both is pretty darn good. Since it is now pretty much confirmed we can make some educated guesses in terms of software and hardware sales. This biggie here is that it is said to release in September however the price is not known. What that does mean though is that the console will release before the release of MAG, GOW III, Ratchet and Clank, FFXIII in Japan and the big one GT5.
My guess is that it will be announced just a couple weeks before release (duh) and it will retail at $299. With that said I see those previously mentioned games selling a lot more copies then if the system remains at $399 (again duh). I always said the PS3 would release when the PS3 got a price cut and I am correct.
I admit I am loony for first/second party sales because that is the reason I purchased the console so predict away!
MAG - 1.5 million
GOW III - 3.2 million
GT5 - 10 million (:O)
Ratchet and Clank: ACIT - 1.8 million
Uncharted 2 - 2.7 million
Heavy Rain - 0.8 million
PS3 sales wise it will beat the 360 during the holiday season UNLESS a 360 slim is also announced, price cut and still a PS3 win. BTW I made a thread similar to this some time ago however it became pretty big and I felt a fresh one was needed.