Playstation Mobile games don't have access to the back-touch for now though. Would get very complicated keeping that compatible with phones, but I and other developers have never the less suggested we should still have access to it, at the very least allow mirroring the front touch as an option or something.
But yeah, I've played around with it, and it is cool. Basically, I'm also hoping for a bunch of neat apps you also get on the other devices, like some of the word games, weather tools and what not, as well as have some really nice platformers and other classic style games that work much better with buttons than they do on iOS.
Developing for Playstation Mobile is definitely really easy - it's the first platform that I've had a breeze developing some stuff for, very easy to get started with and get results, especially if you come from a PC, Java or .NET background. I found it way easier than iOS or Android in that respect.