Ehhh? Sony own the lot and it's their decision. Nothing to do with studios. They know it's a easy cash grab releasing games after a year or so on PC. It's their new business model, I did tell @esmufc07 he was about to lose exclusives, but that guy never listens.
Thinking about it now I can see the scheme. Release it on PS for 2 years or so to guarantee the majority will buy the console and the game, then when it gets old release it again on PC for it to start selling all over again and get more money, winning in both directions.