If you happen to have both the PS3 and Vita versions of Ultimate Marvel vs. Capcom 3, you can try out the "Ultimate Controller" mode: a feature that lets you use the Vita as a PS3 controller with four customizable touchscreen buttons.
No, it's not practical. But it is kind of cool. And in this video, we show you how to set it up, and how it works. Let us take you for a ride ... into the future.