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.
Oculus Rift
The Oculus Rift received generally positive reviews from gaming and tech websites. "Wired" gave 9 out of 10 stars to Oculus Rift and wrote, "The long-promised virtual reality headset is finally here, in a remarkably well-made and accessible device." A review by Dan Stapleton of IGN says, "The Oculus Rift is the first headset available, and it does a fantastic job of not just displaying high-quality VR, but making it easy to use." Many reviewers also wrote about the shortcomings of Rift, such as a hefty price tag ($599 in US) and the need of a powerful PC to run it.