I did write a big thing. But then I got confused and obviously didn't post it. Anyway. Had some time to play some games. Lumines is awesome, Wipeout is good, not quite up to the standard of HD, the tracks are pretty hard to learn due to lots of (very pretty) graphics and visual noise, but the gameplay is there. I'm having a little difficulty settling on a control scheme that works for me. I thought jumping in with the classic 'wipeout' controls would suite me, but the Vita's buttons are just a tad too close together.
Uncharted is gorgeous. It plays really well and is broken down into smaller chunks with a lot of exploration (much more like the first game, and by alot I mean a bit more than UC1 and a lot more than UC3). Plus I played it on the loo. Next gen portable ftw.
Stardust is perfectly suited to the handheld and great for short blasts, Motorstorm RC the same.

Now to earn some trophies and wait for Gravity Rush....