|Importance of various attributes of wireless video links for HMDs|
Another key difference between in-home HDMI extenders and professional HMD-driven wireless links is the transmission technology. In-home HDMI extenders typically use ultra-wide band or the new 60 GHz extremely high-frequency radio band. Both of these need line of sight between the wireless transmitter and the wireless receiver. However, imagine an HMD user wearing the receiver in a backpack and then turning around. The user's body can easily cut off the line of sight between transmitter and receiver. Thus, technologies such as Wireless N which are not sensitive to line of sight limitations are clearly preferable for wireless HMDs.
I believe that wireless video links will help unleash the true potential of the personal, portable HMD. The freedom of movement, multi-user interaction opportunities offered by wireless links are substantial and I'd expect many exciting applications to materialize in 2011.