Pantomation (1977-1979)

Via Slashdot:
"30 years before words like performance capture, augmented reality, or avatars were around — let alone commonplace — experimental film and video artist Tom DeWitt created a system that features aspects of all of them. Pantomation let users interact in real-time with a digital environment and props. It was built using Apple IIe's, analog video gear, and lots of custom hacking and patching. He's currently working on a holographic 3D system that's similarly ahead of its time."