Set whether the HMD content will be streamed via Steam In-Home Streaming If this is set to true, then the scene in the HMD headset will be streamed, and remote input will not be allowed. If this is set to false, then the application window will be streamed instead, and remote input will be allowed. The default is true unless "VRHeadsetStreaming" "0" is in the extended appinfo for a game. (this is useful for games that have asymmetric multiplayer gameplay)