Games sell hardware and hardware sells games.
Withe the PS3/PS4/Xbox 360/Xbox One, those were certain to have a huge userbase. Their fans buy their consoles based on the potential of things to come. With the success of the PSP (another console that 3rd parties assumed would do well) came some disappointment in software sales--aside from a few winners. It was also a device that required high production to take advantage of its power. The combination of expensive to produce games and the potential for PSP like game reception (due in no small part to piracy) led most 3rd parties to hold off. At the same time, the gamers held off from the hardware due to the combination of smart devices and portable gaming losing its cool.
I pulled that out of my ass. You like it?
