I had a summer job writing an app for an early VR headset back in the late 90s; an early i-Glasses model, IIRC. It was awful. Terrible, terrible, terrible. The

I had a summer job writing an app for an early VR headset back in the late 90s; an early i-Glasses model, IIRC. It was awful. Terrible, terrible, terrible. The twin 320x240 LCDs were okay, if you like a graininess and a tiny field of view, but the true horror was the head-tracking: like these arcade headsets it used electronic compasses to determine the headset's orientation, and in a steel frame building, in a university, in an office above the Physics Department's NMR lab, it basically didn't work at all. The 9600 baud serial link which it used to send position information back to the PC (in ASCII!) added an exciting few hundred milliseconds of latency, but nausea wasn't a problem as the random jitter, slow sideways tilt and occasional random spins as someone downstairs powered up the NMR had already rendered the view incomprehensible...