The PlayStation Vita is a fantastic platform for remakes and ports (Metal Gear Solid HD Collection, Ultimate Marvel vs Capcom 3, Final Fantasy X, etc), but if you're looking for something wholly original, look to Sony's Gravity Daze.
We've played it as Gravity, the name under which it was shown at this year's E3 expo. It's being shown at this week's Tokyo Game Show under its Japanese title, looking just as lovely as ever.
New gameplay (in Japanese) is in the trailer above. We're not yet sure when Gravity Daze is due, but since it's not among the 26 launch titles for the PlayStation Vita, it's probably going to be a while.