A single eye VR/AR headset, think a Borg ocular implant, but smaller and nicer looking. With a high quality camera for see-through functionality. Used as a HUD for, well, anything. Reading web pages, Google Maps, Google Search and Assistant, notes, schedule, how to instructions, etc.
Definitely a very niche product (then again, so was Google Glass), but I would love to make one haha. Best thing is, anyone could build it using easily available components and software. https://github.com/relativty/Relativty was my inspiration, I see no reason why that wouldn't work in non-3D on a single display.
Anyone have any thoughts?
(Also, if you want to build it, hire me, I would work on this 12hrs/day for ramen money heh)