At least in Norway that is already practical over most of the country with an electric car, especially a Tesla because there are so many chargers.
I have driven from south of Oslo to two hours north of Trondheim and back at least half a dozen times in my Tesla S 70D. without trouble.
It looks like Tesla in Sweden haven't invested in quite so many chargers yet but even there they are typically less than 150 km apart even in the north and of course there are more public chargers being built all the time.
I agree that most other brands of car have had rather shorter range but they are catching up rapidly.