This article profiles two young professionals who succeeded in a new marketplace by making an existing product better and by bringing back a Texas tradition. Rather than reinventing the wheel these two took advantage of an emerging market searching for new products and ideas.
http://www.wsj.com/articles/meet-two-of-austins-brightest-entrepreneurs-1454600614
This article seems like a great portrayal of Jane Jacob’s ideas concerning the economy of cities and how old industries involuntarily create spin-offs that then grow and become established businesses.