Virtual reality
VR is most commonly used in entertainment applications such as gaming and 3D cinema. Consumer virtual reality headsets were first released by video game companies in the early-mid 1990s. Beginning in the 2010s, next-generation commercial tethered headsets were released by Oculus (Rift), HTC (Vive) and Sony (PlayStation VR), setting off a new wave of application development. 3D cinema has been used for sporting events, pornography, fine art, music videos and short films. Since 2015, roller coasters and theme parks have incorporated virtual reality to match visual effects with haptic feedback .
HTC Vive
Prototypes of a Valve-produced virtual reality system were demonstrated during 2014. On 23 February 2015, Valve announced SteamVR and that it would demonstrate a "SteamVR hardware system" at the 2015 Game Developers Conference. HTC officially unveiled its device, Vive, during its Mobile World Congress keynote on 1 March 2015. Preorders started on 29 February 2016 at 10:00 a.m. EST. Valve and HTC have since announced that the headset will be free for selected developers.