I suspect when the majority of vehicles on the road are self-driving and proven highly reliable that many people will no longer have driver’s licences as we understand them.
A person might hold a simplified license, much like people who are licensed to drive an automatic car (automatic gears) but not a manual car (manual gear shifter), or a motorcycle licence versus a car licence versus a heavy goods vehicle licence.
Having a licence to operate a vehicle will be reserved for professionals, people who like to drive for pleasure, and enthusiasts.