Ask HN: Developing a “4D” VR Experience. Best Tools for the Job?

My team is creating a "4D" VR experience. Basically, we are triggering a 360 video with a HTC Vive. I'll also be controlling external devices, namely a fan and a butt-kicker (for vibration). We'll also be showing the in-headset view on a projection in the space.

My best guess is that Unity would be the best tool for this job. But before I dive into a Unity crash course, I was wondering if this might be possible with WebVR, Three.js, maybe wrapped up as an Electron app?

Are there other tools I could use to create this that I'm just overlooking?