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".
NeuroSky
Research Products: Neurosky has produced a number of research products (generally very similar to their direct to consumer products ). These products have been widely adopted due to positive reviews by early adopters with Richard Reilly Ph.D., professor at Trinity College in Dublin stating that, “We have been impressed with the quality of data from the MindKit Pro, compared to our gold-standard EEG acquisitions system. It has opened new possibilities for the remote monitoring patients’ activity a great benefit in patient care.” 
Mind Kit & Mind Set: The Mind Set (referred to as the Mind Kit in early press releases) was NeuroSky's first direct to consumer product. With a number of prototypes sold in 2007. The Mind Set was the first direct to consumer BCI product under $1000 ever made. The MindSet consisted of headphones with three sensors on one ear piece and another on a flexible arm coming off of the headphones that sat on the forehead. The headphones had a wireless Bluetooth connection and came with a small Bluetooth dongle. The first non-prototype models were sold for $199.