By 2025 it is estimated that 630 million people will live in 40 megacities around the world

Jared Cohen, Director of Google Ideas says that technology has gone from being a laughable sideshow to technology being integral to every single aspect of our lives. Cohen says that cities and governments should look at what technology can help its citizens.

http://www.ericsson.com/news/131213-by-2025-it-is-estimated-that-630-million-people-will-live-in-40-megacities-around-the-world_244129226_c