The first pilotless military aircraft, other than reconaissance drones, are at least ten years away. These are being developed more for extreme manoeuvrability (ie can't go outside about -3 to +9g with a human on board) than for cost reasons.
It's taken about twenty to thirty years for HUD's and fly-by-wire to get from fighters to airliners. I can't see pilotless civil aircraft in widespread use for another thirty years or so.
I retire in thirty five years... Hope my prediction is right!
O8