One thing Sony has to add now is the ability to download games if that game is natively supported on the platform. If someone wants to play a game such as Knack with PlayStation Now on PS4 I don't see a reason why you don't just let them download it. It gives the customer a better experience and I'd assume it's cheaper on Sony's end as well (surely letting someone download a ~50GB game once costs much less than letting them stream it for hours?).
And it would be awesome if Sony could do the same on PC, although that might be a bit harder since Sony doesn't have their own store on PC at the moment. But just like the example I gave with Knack on PS4, why not let someone download a game such as Assassin's Creed III on PC instead of forcing them to stream it?
Also one thing they need to do is replace all PS3 games with their PS4 version if that version exists. Having the PS3 version of the game on the service while a PS4 version exists would just be taking the piss.
