Contratry to the Sony is streching its studios too thin thread, I feel that this year will be the last year of PS3 exclusives, the same goes for the Xbox 360. 3rd parties will continue to support the system with their offerings to capitalize on the huge userbases. This will allow Microsoft to focus on the next xbox, and Sony will be down to supporting two platforms, the vita and next playstation.
I still feel that production wise, the PSP will be sold until 2014 to give Sony another 10 year system, the same for the PS3 (2017). Unlike the original xbox, the 360 will still be manufactured until at least 2016.