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.
Windows Mixed Reality
In October 2016 during a hardware event, Microsoft announced that multiple OEMs would release virtual reality headsets for the Windows Holographic platform, based on Microsoft reference designs enabling room-scale virtual reality without external sensors or components. In January 2017, prototypes were presented at Consumer Electronics Show for release later in the year, and Microsoft later announced that it planned to release development kits for such headsets during the Game Developers Conference. These devices would be supported by the Windows 10 "Creators Update". At the Game Developers Conference in 2017, Microsoft stated that it intended to support Windows Mixed Reality headsets on Xbox One in 2018, specifically noting the capabilities of the then-upcoming Xbox One X hardware revision, but the company later stated that it was initially focusing on PC platforms first, and that it wanted to focus on wireless VR solutions for consoles.