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.

Does anyone know more about the underlying software? QLab[1] is the standard theatre light/sound/video/etc tool, and I can think of a couple of ways you could (in theory) build this in there. Is that what they did, or something else?

[1] https://figure53.com/qlab/

These glasses react to live speech and stage cues. The ones developed for movie theaters can be much simpler technology since the pacing of a movie never changes. You just have to sync to the subtitles once and then they are synced for the entirety of the movie. Theater performances can vary from show to show and therefore these glasses have to be able to continuously react and adjust in order to keep in sync.