As the Southern dispute was about to ramp up, I thought it would end in a 'Strathclyde Manning Agreement' type scenario, where Guards would be de-skilled but still be retained and be booked for every train, only not being required with late notice sickness etc. No-one would lose their job, and still be retained.
That's pretty much what happened with their conversion into On Board Supervisors (instead of Strathclyde's 'Ticket Examiners').
I expect similar will happen in the future elsewhere in the country, and in fact, has been agreed at South Western Railway where Metro Guards will no longer operate doors and dispatch trains, focusing instead on on-board ticket checks and passenger assistance. This has only not been widely seen yet, now several years after their agreement was ratified, because class 701 introduction has taken so long.
Merseyrail has also moved their Guards to 'Train Managers' but an 'assistance completed/not required, okay to self-dispatch' key card or fob is used at each station by them, which still involves them in the running of the train to some degree.
Both SWR and Merseyrail have made their changes since the Southern DOO dispute, and Greater Anglia Conductors are no longer routinely involved in door operation or dispatch, but are still trained in case of degraded working - fault with DOO monitors etc.
As I said, I think similar moves will be made elsewhere in the country - a change to Guard/Conductor roles, rather than an elimination.