I got my Leap Motion controller last week, and played with it using the Driveline front end. It only seems to work with a single screen, and I am using Driveline on a dual screen desktop for testing. I am able to use it as a controller just fine, however it does require more concentration to use, because you have to move your fingers to a focus point to select something on screen. That means moving your hand in the air, either closer or further away froim the Leap device till the circles onscreen reach a focus point, then the circles (cursors for each finger) turn green and are detected as a click.
It's fun to play with. I used it to play a game of solitaire just fine, but I don't think it will work so well as is in a car enviroment without special programming. It does work with a PC as a 10 point multitouch controller though.