PDR1 ; To say there`s not much difference between train drivers and pilots clearly makes obvious that you know absolutely nothing about what you are talking about. Furthermore , your ignorance of the profession gives further reason why many like you actually believe it could happen in the next 20 years. There will be no commercial pilotless jet operations anywhere for at least 20 years. To articulate the engineering , liability , technological , social and business cases for this to be at least a generation away , you would need to get your head out of the sand.