The move to electric is a natural evolution, and will have a significant impact. The economies of scale in terms of pollution mitigation at power plants will utterly dwarf anything cars have ever been able to do themselves, transmission losses nonwithstanding.
Even if they only displace urban drivers (fewer per-trip miles, more population density facilitating more charging stations), the impact will be transformative. Watch the AQI loop around New York, and you can see air pollution rising and falling along the commuter roads into the City in lock step with the morning commute. I can't even imagine a New York with 50-80% fewer gas-powered cars on the road.
But that's still just evolution. Electric is just a natural step.
Driverless cars are the revolution. Electric makes existing car use patterns better. Driverless makes an entirely new paradigm. It may eliminate mass car ownership. It might eliminate parking lots. It might eliminate light rail in suburban areas. Taxis. Deliveries. Shipping. Police reponses.
Electric makes things better in well-projected ways. Driverless changes everything forever in ways we can't yet even imagine.