The cryptic "already building" haunts me.

Augmented-reality (AR) glasses

Imagine wearing a pair of glasses that could collect and display data, and, for example, alerts you that a colleague is walking into the room and informs you that you owe her money from a Super Bowl bet.  The display disappears into the glasses and doesn’t impair your vision like, let’s say, virtual-reality (VR) glasses. eMagin is already building 10,000 cd/m² bright OLED microdisplays that disappear into AR glasses.

https://www.electronicdesign.com/technologies/embedded-revolution/article/21241387/marketer-international-dont-look-now-disappearing-displays