The article touches on a lot of the software and UX issues, but I don't really see much about the hardware.

> The theater has bought 50 pairs, at a cost of around $1,050 per pair

So pricey, yes, but who is currently selling anything like this? Things like the privacy of the contents of the display and the bulkiness of the unit are interesting aspects of this technology as applied to other use cases.

Searching for "heads-up display glasses" yields a bunch of actual products of varying appearence. I know AR is all the rage, and that's what most of these products seem to advertise, but even having some limited real-time data seems like it has enormous applications.