I'm keeping my Vita, if anyone cares. I realize that there's always gonna be that guarantee that's it's gonna have at least 10 "must-play" games on it, in the span of it's lifetime.
See, I thought that too for the Wii, but I only own seven games and bought it on launch! Haha.
I don't have a lot of information for you on the Vita, since I don't have one, but I'd say hang onto it. The PSP was a slow-starter too, and there's a ton of great RPGs for it now.
Ha, jokes on you, I bought the Wii on launch and only own 4 games! Ha-ha. ...I paid like 200 bucks for a Smash Bros. and Fire Emblem machine.