Remember the last CC when AS said "excited to hear from the test pilots"? I confess I have a conspiratorial proclivity. Read the Kopin stuff. Now, one step further, This effusive valentine from the formerly skeptical National Interest re F-35

The helmet-mounted display allows critical flight data to be viewable anywhere I look,” explained Marine Corps Major John “IKE” Dirk, a test pilot and the F-35B DT-III Officer-In-Charge (OIC) from the Pax River Integrated Test Force (ITF) assigned to Air Test & Evaluation Squadron (VX) 23 based at Naval Air Station Patuxent River, Maryland.

 leads me to the possibility that the "improved" display in the J-20 HMD was a plant. Let em have it, it's the State-of-the-Art, not really. Remember the eMagin High Brightness was funded by the Navy and Tested & Evaluated at Pax River NAS. The problem wasn't just "Green Glow".

https://nationalinterest.org/blog/buzz/check-out-amazing-helmet-makes-f-35-high-tech-weapon-future-76361