Heard about this Arcan project. This article is what introduced me to it. Still not sure what it is, but I suspect it's the solution to everything. I shall go down the rabbit hole.

Prolo Ring is a wearable gesture controller for mouse movement, scrolling, shortcuts, media actions, phone/tablet workflows, and AI glasses navigation — all from one ring.

Looks cool. A very niche device though. What if the company goes bankrupt? I doubt it can be easily repaired.