Swappable batteries likely won't be cost effective for cars for safety reasons, if nothing else. Most EVs have the batteries "buried" in impact-protected spots, with firewalls between them, and in such ways that the battery is reliant upon and sometimes in turn contributes to the structural integrity of the car. Even if the packs were standardized by regulation, getting safe access to the packs in most EVs is expensive and unsafe access is potentially hazardous to long-term fire and/or structural safety of the vehicle.

Anyway, yes, the focus on charging inside of cities should be places that cars are already parked. For travel between cities, it will be businesses that can best take advantage of 30-45 minutes of downtime (assuming fast charging), and I do think it's going to be a restaurant chain and/or mini-mall concept that's going to be the best fit for highway travel. It's going to take a smart franchise or two to experiment there, and it may even be an existing franchise like Pilot or MacDonald's perhaps, but it will be a shift away from smaller convenience stores to probably something larger with more to do.