I built this as an experiment to get acquainted with the Windows Holographic platform. I believe Javascript could be a great jumping off point for developers who are interested in hologram development on HoloLens.
There's a lot to understand when it comes to getting started with HoloLens (Unity and DirectX are the only choices other than this) and the ramp up time can be significant. A lot of web developers out there have experience with, or have played with Three.js. My hope is to bring WebGL and Three.js to HoloLens so the barrier to entry for curious developers will be as low as possible.