Fukuoka-based startup company, Shikumi Design has developed a futuristic musical instrument that you can play with your own gestures. It's called "Kagura", after the traditional Japanese word that refers to a form of theatrical dance dedicated to the Shinto gods.
Kagura's producers describe the app as an instrument that “makes it possible to perform music by moving your body, without touching anything.” You can also append your voice to Kagura, arrange the tempo of music and where to put the sounds on the screen.
The app can work with any Windows PC with a built-in camera if you just want to play instruments as it can respond to 2D movement, but the new version supports Intel RealSense 3D technology (if you are so inclined).
Check the app out in action: