Urbanisation around the world is rapidly increasing with the formation of urban areas in China or India that might include more than a hundred million people.
It's very ironic that you're accusing the author of not getting out of the city when the rest of the entire world is getting into the city, I'm sorry to say that the American suburbs are not the fulcrum of the world any more. By talking about the future of the American city the author is at least approaching what is going to be the most relevant living arrangement of the future.
And when we're talking about children the Dutch may be of some advice who manage to carry them around just fine. Even in Western Europe which is more comparable to the US, children do not automatically imply the need for a car.