The evidence trail is there indicating that Microsoft Hololens has been devloping AR Systems with SA Photonics for some years. Put "AITT" in the search box of my copy and paste operation and you can pretty much draw a straight line from USMC TDG to TDK from SA Photonics AITT

to Hololens. Remember the new dictum? "We train as we fight". SA Photonics use eMagin displays exclusively. I still chuckle thinking of Rony Abovitz getting set up and shutdown by the Pentagon with their attempted Magic Leap into Defense World. SA Photonics has been funded by the DOD from 2002. Magic Leap since never. Long story short, Hololens MilSpec for Training and in the Field will employ eMagin displays. No question.

https://www.mobilescout.com/microsoft/news/n78905/us-military-microsoft-hololens-military-training.html

https://www.sbir.gov/sites/default/files/SBA_Success_SA_Photonics.pdf