Sony Japan has revealed a new PocketStation App for the PlayStation Vita.
The memory-card-with-a-screen will work with saved game data for specific games, most likely allowing developers to release old-school mini-games for players to test out on the old style LCD screen of the Vita app.
Other than that it's a bit of a mystery to us. But maybe we'll find out more if this ever releases outside of Japan.
Here's a video.