Exactly. That was the first thing I thought. To me a real solution is "Given what we have how can we evolve to make it better". It will be a blend of zoning, re-purposing, blending transportation systems and definitely political debate.

One study in Dallas is looking to get rid of a downtown freeway connector and use that space to build out more of the city. http://coalitionforanewdallas.org/. It is an ambitious project but is very interesting.