Is it not concevable that within say 10 to 15 years, freight and mail may be flown by pilotless aircraft.
At the end of the day it all comes down to money. What is cheaper for a cargo airline? Buying a costly all new developed unmanned cargo plane, that needs changes in the international ATC system, ground guidance, international law issues, regulations etc. OR buying an old crappy 757 and putting in 2 underpayed despaired pilots. I don't even need a calculator for this one. Pilot income are peanuts in an airline system.