Technically viable,
1-FMS programmed via WIFI at the gate, aircraft serviced.
2-Engine start could be automated or performed by ground personell
3-Bush back with ground commands for brakes - taxi with GPS guidance and TCAS, proximity sensors as backup or supertug to the threshold.
4-Automate flaps, gear, spoilers etc.. (not hard)
5-FANS allready exists next step would be commands instead of messages, FMS could command T/O rollout by FANS command interfaced with FMC's etc.
6-FANS could continue to command an aircraft, flight level changes, wxr avoidance to tech failure resolution procedures, passing off the aircraft from controller to controller commanding changes.
7-intercept ILS, controller arms land mode and switches to another controller who just monitor approach and rollout ready to hit G/A and pass back off to tower.
8-finally steps 4,3 and 2 back to the gate.
All ground controller and most handeling steps could of cource be automated in the future. I see this coming one day first with 1 pilot monitoring the aircraft performing a series of required attention tests to make sure he does not fall asleep.
I say to all the naysayers, what would pilots have said back in the 60's about removal of the F/E's position, or years before that of the navigator.