The most advanced user interface for AR /XR headsets aren’t made by a Silicon Valley tech company. They are the F-35 HMDS (helmet mounted display system) they cost almost $500K and have 360 view of the entire aircraft. Each helmet is custom fitted for the pilot, with sensors, display etc 

It is an engineering marvel

creating and destroying; built flying cars & autonomous vehicles, now building /faust, more here: /july, web: july.rocks

Writing a larger piece around how the market for AR/VR will likely always be enterprise and military. Everything else is essentially a loss leader for those markets since they can justify the price point and the tech can adapt to existing use cases.