One reason there are still lots of truckdrivers and not AI's driving those trucks is that even if you could build one it would be very hard to make it cost effective.

Long term it will probably be more like the drones piloted by guys sitting a couple of hundred (or thousand) miles away, jobs will be broken up into groups based on the 'hardness' of the problems that need solving and then get parcelled out a-la the mechanical turk.