Re: Pointless and expensive technology
If it hands over control, it would more likely be in the situation where it detected a fault with one of its sensors, or mutually exclusive measurements between say the radar and camera data.
It's got a long way to go, but the benefits are pretty obvious to me. A mesh network that allows following cars to know the very moment your emergency braking manoeuvre occurs so they can avoid you is a pretty big one. Think a broadcast to the other cars of "this is my planned way of avoiding obstacle"