Check out the digital hologram at GE. If you don’t have a printer you can watch it on youtube here. The idea and the way it is done it is just amazing. It is such a great concept for human interaction with computers.
The only negativ is maybe that you have to print it out on paper. But that should be no problem to correct in the future.
Why not use it to map clothes to your body in a web shop or play on a hugh drum set with your hands and doesn’t everybody love air guitar?