I love the idea especially for racing games since it would increase the experience a lot if you would be "in the car" and it would even help a lot to estimate the distance to the next braking point and stuff like that so that I would pay probably around 400 bucks if it would support games like Forza and Gran Turismo and if it would also work at least for PC. Less if it would really work only on one console since I would feel stupid to buy different headsets which work only on one console and not the PC for such a price.
But as long as not enough games would be supported I would probably not buy it at all as long as it isn't something like 150 bucks and I still can't imagine that all these games would support it anytime soon. Hope I'm wrong.