Story of cities #future: what will our growing megacities really look like?

Will we live in buildings made out of waste, heavily surveilled smart cities, or maybe floating communities designed to cope with rising sea levels?

Amid the much-mythologised graffiti that appeared around Sorbonne University during the French civil unrest in May 1968, one line still stands out as intriguing and ambiguous: "The future will only contain what we put into it now."

What appears at first utopian has more than a hint of the ominous. While augmented reality creates a city individualised for every occupant, and developments in modular architecture and nanotechnology might result in rooms that change form and function at a whim, the problem lies in the unforeseen. The smart city will also be the surveillance city.