Interaction with the PlayStation 3 has got to be one of the primary selling points of the PlayStation Vita.
You can transfer or back up your valuable content on the Vita simply hooking up to the PS3 console (or you can use a PC, too). If you want to see how it works, check out the screenshot gallery at Joystiq .
You handle the transfer process from the Vita, which has its own Content Manager Assistant application. You can move photos, save files, videos, music, etc., and all in all, it's definitely a cool feature. Transferring PS1 classics and other stuff you nabbed on the PSN should make for a better on-the-go experience; after all, it's kinda like having the PS3 in the palm of your hand. Then there's the functionality that will allow certain games to be played on the PS3 and then, after making the save transfer, you can keep playing on the Vita.
I suppose the price is still an obstacle for many, but with phones costing what they do (even with a free upgrade), and given what Sony's new portable is capable of, I'm not sure the price tag is too far out of whack.