Theory 4. Sony bribed Rockstar to delay GTA IV. Sony made a recent deal with Rockstar. As a result, a new mystery franchise was 'unveiled'. However, the nature of the deal and the agreed sum remain a closely guarded secret. Now, also consider that Microsoft has the upper hand when it comes to GTA IV, thanks to the aforementioned DLC exclusive. Anyone looking to buy a new console in order to play GTA IV has therefore decidedly little incentive to choose a PS3 over an Xbox 360 (from a purely gaming perspective).
Also, the last thing that Sony needs is an even bigger surge in sales of the Xbox 360 this Xmas. Therefore, although pushing both the Xbox 360 and PS3 version sales into 2008 harms both console manufacturers, the damage it does to Microsoft is a little bit higher. This would also give time to quash the idea that the 360 version would be hitting shelves a couple of weeks ahead of the PS3 version.