Take a look at this video by Ed Glaeser in which he talks about the value of cities. They are engines of learning, efficient, green, and generate incredible returns to the people that live in them. Paradoxically, in the digital age, the benefits to being close to other people are overwhelming. Digital media acts more as a complement to that, often encouraging face-to-face engagement, or by making it more efficient, rather than replacing it as many assume. You may also like the book.