The Vita version includes tweaks to make the game more natural on a handheld, like the ability to switch between third- and first-person views by double-tapping on the touchscreen, and using a "pinch" gesture to zoom.
Gilray also hopes to get the HD update of Oddworld: Munch's Oddysee out in June. That's planned for PS3 and Xbox, though of course only the PS3 version was mentioned.