https://www.ainonline.com/aviation-news/business-aviation/2022-10-19/portable-headset-mounted-pilotvision-display-debuts
"The launch customer for PilotVision is the U.S. Navy"
Well that explains the price!
I tried this maybe 2 years ago. This was the reason I found out about Ifly. If I remember it did head tracking for the Ifly. I was more impressed with the software than the hardware. I think it was an old Samsung Galaxy phone in a battery case with monocle.
I actually know these guys - we even had this demo'd in our booth back in 2021. Love what they do! https://youtu.be/KfMaJdvaxfk?t=51