virtual reality is a multi-sensory experience. An HMD is not enough. For the complete experience, head tracking and audio are required, and a microphone is also useful to allow the user to communicate with others. Previously, such a system required multiple products with multiple cables, adding up to a cumbersome experience.
integrate all these components within one HMD. Use an HDMI connection to carry audio. Embed the tracker inside the HMD and also provide an embedded ‘audio out’ microphone.
a fully-integrated solution that minimizes the number of cables, is convenient for the user and saves money as opposed to buying the various components independently.