Pilotless airliners with/without needle noses
(a) You still need pilots (earning pilot salaries) on the ground, although you could save on hotel bills
(b) The testing and certifiaction would cost unimaginable amounts of money.
(c) The first airline to try it would have to give away tickets to get anyone on the aircraft.
(d) The first pilotless airliner to crash would also be the last.