1: To get a good start of PS4, GT6 is going to make the ps4 a sucess in sales which Sony needs with todays big moneylosses. 2: GT5 is as good as it gets on todays consoles, to get something worth called GT6 it needs more horsepower. PS4 will bring that. 3: Since they starting to talk about GT6 it means we are about 1.5 - 2 years away from the finished game. Perfect for a ps4 launch. 4: With early PS4 launch there is time left in PS4 lifespan to launch GT7 if needed 5: The game needs new incomebase, that means competition with prizes on more regular case than today. For that there needs to be better network and gamestability + rules. PS4 can handle that. For me this is enough to convince me it is a PS4 title and it should be a PS4 launchgame. The timing should be perfect too...with GT5 getting its final update + some new DLC to keep fans playing for a year or two.