For less than a year's subscription cost to Playstation Now ($180), you can walk into any GameStop and get a PS3 refurb and a substantial portion of the games offered by the service, as well as numerous other PS3 games now going for as little as $5 there. (PS3 refurbs start at $40.) The games will all play perfectly regardless of your internet connection. You'll also have the option to buy numerous PSN games that have no disc version nor appear on Playstation now.
I'm just not seeing the value proposition, unless you are simultaneously insensitive to expense yet have very limited space in your home.
As for the Vita, I'd buy another 64GB memory card right now if a good price came along. Still a ton of content I expect to acquire and I like to keep it all immediately available.