Virtual reality
The 1990s saw the first widespread commercial releases of consumer headsets. In 1991, Sega announced the Sega VR headset for arcade games and the Mega Drive console. It used LCD screens in the visor, stereo headphones, and inertial sensors that allowed the system to track and react to the movements of the user's head. In the same year, Virtuality launched and went on to become the first mass-produced, networked, multiplayer VR entertainment system. It was released in many countries, including a dedicated VR arcade at Embarcadero Center in San Francisco. Costing up to $73,000 per multi-pod Virtuality system, they featured headsets and exoskeleton gloves that gave one of the first "immersive" VR experiences. "Computer Gaming World" predicted "Affordable VR by 1994".
HTC Vive
In July 2016, VR news website Road to VR used game session figures from the Steam VR platform to estimate that approximately 100,000 Vive headsets had been shipped since launch. In the same month, SensoMotoric Instruments (SMI), a computer vision company, integrated its eye tracking technology in the HTC Vive to turn it into a dedicated eye tracking solution for research and professional applications. In November 2016, Vive announced that it would begin the first retail sales of its headsets at JB Hi-Fi and Harvey Norman stores in Australia later that month.