Virtual reality
Around the same time, Douglas Engelbart used computer screens both as input and output devices. In 1968, Ivan Sutherland, with the help of many students including Bob Sproull, created what was widely considered to be the first head-mounted display (HMD) system for use in immersive simulation applications. It was primitive both in terms of user interface and realism, and the HMD to be worn by the user was so heavy that it had to be suspended from the ceiling. The graphics comprising the virtual environment were simple wire-frame model rooms. The formidable appearance of the device inspired its name, The Sword of Damocles.
Alcatel Idol 4
"VentureBeat" considered the VR headset box to be a "clever value-add" that could be "a good way to move virtual reality downmarket from its lofty Oculus heights". "The Verge" considered the headset to be comfortable, but limited in comparison to the Samsung Gear VR because of its low level of functionality, lack of lens adjustment, and lack of content partnerships (as with Oculus and the Gear VR) beyond Google Cardboard-compatible content.