This is an interesting take on the technology of vestibular stimulation.

Something to keep in mind is that this technology has been around for a while in the medical field for treatment of balance disorders.

Also - I recall back in the very early 2000s there was a company that came out with a vestibular stimulation system for VR use - the idea was to induce the feeling of motion. You could plug it into your computer, and it had a Windows API that you could control it with.

They were still in a development phase; you could purchase a device and the API for developing with - it wasn't a retail product at the time. Ultimately, the dot-com crash took them out and they disappeared before they really got off the ground (also, VR was in it's "winter" - that didn't help).