A little surprised that there isn't a homepage article on this yet (no doubt one is on its way though), I picked it up from the BBC this evening:
http://www.bbc.co.uk/news/technology-25645867
Basically Sony is going to provide a streaming game service from its servers to PS4, smart TVs and other devices. It's an interesting concept, leading on from OnLive's offering (which I don't think ever gained much traction), and will be intersting to keep an eye on. Given SteamOS's apparent focus on streaming games from your PC, I did wonder if Valve had considered doing an online game streaming service as an option for SteamOS. Apparently Sony think the infrastructure is there to support such a service, so perhaps streaming your library from Valve's servers will end up being an option on SteamOS after all (it would certainly provide a more obvious use-case for a SteamBox....).