For the wired VR HMD use case, due to there is wire which will limit the user’s movement so when there are multi-players in the room to play the game together, they might NOT BE easy to get collision. In order to provide the better UX, there are more wireless VR HMD coming to the market, however, without the wire, the users might be easier to get collision in multi-players user scenario. Wireless VR HMD is getting popular because the wired HMD will limit user’s movement so the UX will be limited. However, with more and more multi-players game or multi-users training material coming to the market, lacking the users’ location detection, and warning message, the user might hit / hurt the other users nearby, so it becomes a danger situation
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INC, HP, "ENVIRONMENT DETECTION AND COLLISION AVOIDANCE BY UWB DESIGN ON HMD AND JOYSTICK", Technical Disclosure Commons, (May 30, 2022)