I think it looked like this:
Not quite as pretty as modern board games, but it was probably cool enough back then. Next century Gamers will probably wonder how we endured games that didn't have holographic minis running around slaying each other. 🙂
Two gratuitous Links to VERY cool hologram Videos:
Hatsune Miku performs World is Mine in Japan several years ago.
This is more current and more incredible.