For me, the most interesting aspect of AR would be interfacing with all sorts of electrical appliances on an AR HUD. The device could emit a simple API and UI

For me, the most interesting aspect of AR would be interfacing with all sorts of electrical appliances on an AR HUD. The device could emit a simple API and UI description in some standard format and the headset would take care of the rest - basically the Horizon: Zero Dawn approach. The more powerful appliances the more complex methods of interaction could be exchanged between it and the headset. No electrical appliance would be limited anymore by having a terribly designed touchscreen LCD or press button menu system.