I think that’s infrared but the same idea. That never quite worked. Also, Leap didn’t continue to refine their hardware for consumers. They have next generation hardware that’s going directly into VR headsets, but you can’t buy it.
Seems to me that you can buy the SDK[0] (which is not much more than a Controller and a bracket to hold in against your VR headset of choice), so at least they've made some progress since 2014.
[0]: http://store-eur.leapmotion.com/products/universal-vr-develo...
https://www.engadget.com/2014/08/28/leap-motion-s-next-senso...