Only a small fraction of the article was about housing prices in the suburbs. The vast majority of it was an exploration of the idea that many of the drivers to people moving to the suburbs are going away (better infrastructure, lower crime, more prosperity).

Further the articles main point may be that mitigating those problems in the suburbs may be harder than the all ready tricky task of mitigating them in denser urban areas due to higher infrastructure costs, increased transportation costs and more limited areas for new development.