Incidentally, Air Traffic are even more ripe for unmanned.
It's crying out for an integrated computerised system. Simple fuel economics will force the hand to avoid all the holding caused buy the system being beyond the capability of a human to run efficiently.
Actually, you would be surprised how uneconomical to the user it would be to have a fully computerised ATC system. They've already been working on it for years and still can't eliminate the human element.