Cargo ships ply the oceans and when leaving and arriving in port they are taken over by local marine pilots who guide the ship in as they have local knowledge.
This means of transport is predictable and moves in two dimensions. It would be ripe for automation but that is not happening.
Trains run on FIXED tracks and in some places are driverless but this is not widespread. I think that is because the passengers want someone up the front who has a vested interest in getting there safely.
So until both of these forms of transport are largely autonomous then pilotless aircraft are just a wet dream of people like MOL. Even the so called US drone aircraft have pilots in a room in the US. They are remotely controlled.
Boeing need to glass up? What does that mean?