I have already considered looking into this (As I already fly FPV quadcopters). (I can't look at your link at work though)
I am not sure that I would want to wear something like the goggles all day though, you can do modifications to mount them inside ski goggles to make them more comfortable.
They are now also coming out with units you wear with screens inside instead. Once they can start shrinking these I think we may get more luck. I had the idea of looking into trying to mount a small camera and screen into an RF to make it functional from that aspect.