As I understand it, there’s already a lot of autopilot functionality happening in the latest commercial aircraft, and I guess I’d trust a robot more than, say, a pilot with a drug habit. But I guess it’d be a while before I’d trust a situation with no human pilot on there at least an emergency backup.
The only way a human pilot is worth anything as a "emergency backup" is if the human pilot is actually flying the plane most of the time and uses the autopilot (by whatever name called) only when he needs a break.