Is this ready to use? No. But I'd like to point out what may be novel UX ideas here that are worth improving on.
* raise your hand in front of device to activate the projection
* move hand to increment/decrement a number
* close hand to tap
With image recognition, other gestures with the projection hand like tapping fingers or touching the image with the off hand would allow other interactive inputs.
I’m personally impressed by how you navigate the radial menu by tilting your hand as if you were balancing a marble. With some improvement, this would feel very intuitive!
