See this city car? I think it's awesome, at least for 90% of the driving I do.
A tank of gas can last me weeks, because all my running around is little two-to-five-mile trips a couple or three times a week, all on surface streets. Half my errands are done by bicycle unless the weather is just buck wretched.
Except, being an American, I have friends that I occasionally go visit that are not located right next door (if you're reading this in Europe, that means "half a continent away" in foreignese,) and when I go, I like to go by road. When I go by road, by myself, it's a lot closer to the 24 Heures du Mans than it is National Lampoon's Vacation; the car stops long enough to take on fuel, and that's it. And I don't imagine these little city cars would be a boatload of fun with the cruise set at 80 for five+ hours straight.
So as long as I'm a one-car person, that car's got to be capable of knocking off four- and five-hundred mile roadtrips on the superslab in speed and comfort. Maybe there'll be a market in cheap used microcars someday...