From what I’ve heard (cannot confirm) their technology has to do with projecting directly into your eye, which for now supposedly provides better augmentation of reality than screen-based systems like Hololens; however, it requires a room fool of equipment to pull through. The valuation was predicated on being able to miniaturize that down to portable size.
The thing is, there is no way to “show” this to the masses, and there is not even a comparable experience (you can’t show oculus/vibe in an ad either, but everyone has played with a 3D display at some point even if only static - such as the red disc toy with 3D images whose name escapes me - stereoscope, maybe?)
What’s the comparable experience of something projecting into your eye?