Returns true if there is an HMD attached. This check is as lightweight as possible and
can be called outside of VR_Init/VR_Shutdown. It should be used when an application wants
to know if initializing VR is a possibility but isn't ready to take that step yet.
Returns true if there is an HMD attached. This check is as lightweight as possible and can be called outside of VR_Init/VR_Shutdown. It should be used when an application wants to know if initializing VR is a possibility but isn't ready to take that step yet.