From a tech standpoint I'd be interested in hearing how that sounds, but overall I agree that it sounds dangerously distracting.
I'm not so much concerned about distraction as I am about the effects of 3D audio on the driving brain. Normally, you hear the car stereo as the car stereo and road sounds as the real world, but Atmos will presumably deliver the experience of driving through whatever audio environment is being created. Try not to jerk the wheel when you suddenly hear a scream coming from right outside the window, or when the psychoacoustics tell you you are heading directly toward a brick wall!