I would suggest, from the many resources on IoT (links bellow):
(a) an example of what is happening in London: David E. Boyle, David C. Yates, Eric M. Yeatman, "Urban Sensor Data Streams: London 2013", IEEE Internet Computing, vol.17, no. 6, pp. 12-20, Nov.-Dec. 2013, doi:10.1109/MIC.2013.85
(b) a corporate view from Cisco: J. Bradley et al., “Internet of Everything (IoE) Value Index,” Cisco whitepaper, 2013.
(c) my own future studies view for 2050: D.P. Henriques, "... of things and people @ smart cities," In Bina, Balula and Ricci (Eds) (2014) Urban Futures-Squaring Circles: Conference Proceedings, Institute of Social Sciences of the University of Lisbon and Calouste Gulbenkian Foundation, Lisbon, p.49.