People have done this, though your the first I have seen using googles. It might make more fun though if you got a used PC Race Car Wheel and transfered the radio electronics to it. You can have more of a true Car feel then.

One major problem I have seen with these systems is the inability of the cameras digital eye to cope with sudden movements. Even your video shows this when its going over the snow. Planes, its not a big deal, but cars, your dealing with surface and air (jumps), so they need a camera thats going to be able to continue broadcasting with picture on a jump landing, crash, or a high speed corner.

I'm sure this tech is coming down to consumer $$ levels.