Having first hand knowledge/experience of how RPAs are operating both in the overseas and stateside training environments I don't see pilotless aircraft in my lifetime. Maybe my son's lifetime, but definitely not mine. RPA's were supposed to be cleared to fly in the NAS with no chase aircraft by 2015. The FAA is still dragging their feet on it. It'll be years if not decades before things get ironed out for cargo/pax carrying RPA's.