Quite possibly, yes. However, there are no automatically driven main line trains anywhere in the world as of yet. Computers could only run the trains when things run smoothly. As soon as you get a delay, or you need to implement total block working, or wrong line working, the computers will fall down.
Let me give you an example.
A few months ago, a Southern train broke down at Harrow and Wealdstone, and we came to a stand about three miles past Wembley Central. The signaller had managed to route the services behind us out onto the Fast Lines, but there was us, another LM service in front of us, and a freight in front of that before the failed unit. The Signaller requested the driver to run bang road back to North Wembley Junction to be crossed over, kick all the punters off there and run empties back to Euston, for me and the driver to pick up our diagrams there. Now, the computers couldn't do that, I'm fairly certain. There will always need to be at least one (preferably two, for obvious reasons) members of staff on board trains.
Re the James Street incident - I reckon that was an unsafe conviction. On another day, with another judge, that Guard would never have gone to prison.