The city changes you. In many ways the city becomes you and you become the city. The church at Corinth allowed the city to change them, even their view of God.
Paul writes the first few chapters of I Corinthians focused on the person of Christ and how Jesus should change even how we live in the city. Urban Jesus is a study on how city dwellers should be transformed by the Gospel of Jesus even more than their city.
I think the graphic for the series is pretty cool too.