The big flop of 'After Earth' is going to hurt. They are probably going to lose at least 100 million on that one. That is unfortunate timing.
I don't think Sony will leave gaming - although the could sell it off. I would think they would become a 3rd party maker first. I could see them becoming a PC/X1 developer - or maybe Apple will snatch them up. And if the WiiU can get more sales, for that too.
But it's a bit too soon for doom and gloom.