Well it depends how much production of Slim PS3 costs them (and how much the development of it cost overall) price-cut is still a risky business for Sony since they havent made profit for so long. If Slim can slightly improve PS3's performance then i think they will be reluctant to cut the price hasty.
Also GT 5 is key for Sony in Europe and America , Uncharted 2 looks good but it wont move any hardware (if KZ2 struggled, then uncharted will as well) so maybe PS3 slim + GT5 can do some wonders for them, and make some nice money for the company.
@tedsteriscool
Well think about New Super Mario Bros Wii this game will outsell any PS3 game this generation,and it could be as succesful as Mario Kart.








