The process has already begun - UK petrol station numbers are down by a third since the beginning of the century.

As you say, they'll all but cease to exist in urban areas, with the process mostly complete by the end of the 2030s. I'm not sure that dedicated EV charging stations will be all that common in cities, though. Why not use existing car parks for that?

Some probably will end up being used as surface car parks where there's demand for it, but urban land values are such that I suspect most will be knocked down and replaced with apartments or larger retail units. A few may retain the forecourt structures as a form of kitsch (think of the florists beside Regents Park in London, or the Hyde Park Book Club in Leeds).

There'll probably be a growing niche for domestic fuel delivery services. You might also see a minor resurgence of the very small neighbourhood filling stations that mostly died out in the 1970s/80s - the sort of place that does MOT checks or tyre changes today. Some might end up installing a pump or two, to cater for vintage car enthusiasts.