Actually there were quite a few interesting graphics posted in that
Nat Geo issue, not just the flight sim. This was a year before even
Computer Space, 2 years before Magnavox Odyssey and Pong, 6 years
before Night Driver. Even earlier, there is a "computer graphics
timeline" online (search for it) that cites wireframe animation done
in 1963 for a TV ad (possibly by Bell Labs?). Also, I always wondered
what system they used for the "death star tapes" in Star Wars.