"So the 3DS is out, it's in stores, and the early adopters have them in their hot little hands. And, in typical early adopter fashion, they're already tired of them and looking forward to the next thing. That would be the PSP2, assuming no one pulls a disastrous Saturn-style ploy at E3 this year. Details on the PSP2 are still a bit vague, only because Sony refuses to confirm most of the things we already know from what people who have touched it have told us, but one thing that hit the wires a while back was that Sony was planning to use a new proprietary media system.
So, for interested parties, what follows is a brief history of Sony's love affair with proprietary media. Some are wins, others are total failures. I tried to hit just the speaking points rather than nitpick incessantly on technical specs. Enjoy."