UAVs and the technology have been around since 1959 progressing to new viable methods year by year.
First to go will be the Second Officer/Cruise Pilot followed by the F/O.
Long Haul will initially have 2 Captains eventually one purely to sit in the seat for T/O, approach & landing (and to feed the dog)
Where will Captains of the future get 3, 4 or 5,000hours of experience?
The only reason for drivers remaining on trains is industrial
Pilots have clearly demonstrated they no longer have the industrial will, unity or care to stand up for their future; sadly airline operators/management clearly understand this.