Check this article "Cities: How crowed life is changing us" on bbc.com. It is a bit older but still interesting and relevant.
"[...] the virtual city is as global as it is local. I can get hourly updates on air-pollution levels in my neighbourhood or buy a new battery for my phone from Korea. People from across the world can gather online to share ideas, pressure for change, innovate, spread their artistic talents or make friends. The virtual city provides a way of shrinking and filtering the real megacity, saving time and energy on real journeys across complicated spaces, of accessing multiple conversations with relative anonymity, and of individually helping steer humanity through collaborative creativity and problem solving.