Leap mounts to the front of your Scuba Mask so it senses the hand movements in front of you.
I'm not sure Hitech supports Leap or has plans to. I was going to play around with it and I know it works along with Flyinside for Civ sims (XP, FSX, P3D).
I was hoping eventually it would be useful in stuff like ARMA to use hand to pick things up