Conductive audio has been done before with varied results. It will be interesting to see how well this works for people that try it. Past reviews of similar products basically said if you side mount it, you get much better sound on that side than the opposite side. Also that it wasn't earplug friendly and different helmets greatly impacted how well the sound quality was.
Technology marches on. Perhaps this is greatly improved?
They had some demos at the last motorcycle show. All you hear is vibration. There is no sound. I personally did not care for it. What I did not try was riding with it. Anything that hangs off your helmet puts drag on it and fatigue sets in.