Team Siren, a division of Sony Japan's internal studio, is working on a Vita game called Gravity. You may not have heard about it earlier in the week amidst all the other big Sony news, and that's a damn shame.
Why? Because it looks fantastic, that's why. With a cel-shaded visual style and motion controls, you play a girl in a world that is literally coming apart at the seams. At the dimensional level. So you can end up walking on walls, and use gravity itself as both a means to get around a level and to kill the bad guys.
Gravity's release date is TBA.