I've been saying this since they acquired Gaikai.
I suspect that PS+ subscribers will be able to access the streaming service with free players getting limited access (few hours a month maybe?) and have to pay full price for games streamed (although they'll be tied to the PSN account).
I also remember reading about a patent Sony had that involved registering games on an online account so this could potentially play a factor (put in old PS3 disc and have the game register on your account for streaming). At the time I think most associated it with anti-piracy/anti-used games DRM.








