Those displays are duplicates of some of the flight systems (attitude, HSI, etc). One of the guys on my shift at my fire department, who is a retired AF Lt Col, who spent his career (and some post- in the Middle East doing training) in F-15Es says most likely they were blanked out because (as mentioned in the video) they were displaying motor (what they tend to call the engine) parameters (which might give away some performance characteristics) or weapon configuration.

I'm guessing that the kinds of things the displays show are the fastest evolving aspect of the aircraft. New kinds of networked sensing in particular, both for detection and evasion.