Driving is
infinitely harder than flying, from the perspective of a truly autonomous system. Once at altitude, there isn't much to run into. There are also very few possible emergencies that demand the pilot's attention within the next few seconds. Midair collisions are about the only exception I can think of, and there are already automated systems in place to prevent those. Bird strikes might be another, but those don't tend to coincide with periods of autopilot usage.
For a motor vehicle, though, the idea that "eyes off" and "mind off" should exist as separate levels of autonomy is just nuts. "Eyes off" will absolutely be interpreted as "mind off" by the majority of real-world drivers. It doesn't make sense to offer an "eyes off" solution at all, IMHO. Wait until we can genuinely call it a "mind off" solution.
