This would totally change the dynamic of EVs.
Go to a station, just hot-swap the batteries and be gone. Charging time becomes irrelevant: the stations can be as small as they're now (parking wire), they just need storage for hot batteries and chargers. Because that's how you use anything _serious_ which is electric right now such as power tools and drones: you don't wait for charging.
The idea of "waiting for charging" is something which is fine at home, or to charge the secondary battery pack.
Batteries in modern e-bikes are almost that already. The battery itself includes a controller which advertises what the batter can do often regulates both charge and discharge. This allows the battery to be changed and upgraded in the future.
The limiting factor is that currently every company that does this (f you bosch) wants to keep this as closed as possible, meaning that we essentially can't escape the vendor lock-in or even fix your own battery pack.
This needs to die. If I know I can get a charged battery at every station and be paying for delivered power I wouldn't care less about having my own. This would also put more incentives in keeping those packs as efficient as possible, which in turns is incredibly good for the environment.