Considering man is the weak link in normal aircraft operations I think it is the way ahead. Until something goes wrong of course.
Ok say we are down to one pilot on board monitoring and be there when something goes wrong. What if he/she becomes incapacitated? You're back to a pilot less aircraft with how much redundancy? Not much. Are you going to continue to have 2 pilots monitoring? We are almost there now.
Why not build in numerous redundancy and have the the aircraft monitored from the ground?
Yes at present it will be a hard sell for the passengers. Or will it? If I can get a half price ticket I'll strap my backside to anything, within reason. Knowing and seen who are and what goes on, or not goes on in cockpits around the world a pilot less aircraft is not too far away, IMHO.