EVERYTHING!! So yo dawg
to be precise: you have lots to look forward to my friend! there's assassins creed, black ops, littlebigplanet, and these games are not the same as ps3 but totally new stories and gameplay. also there are another 20 plus more games than i listed, but there are definitly some great games!
There are also some pretty good PSN download games around, like the Foosball one.
Remember though - unless you ordered one already you will need a Vita memory card!
But yeah enjoy it ^^ its a good system so far, its just in need of some HQ games, which i am sure will come eventually.