Privacy is the freedom to selectively reveal oneself to the world. Do the citizens of a city have a right to privacy in public spaces? Will privacy survive in an age of surveillance, sensing devices and the smart city, or will it shift into an entirely new paradigm? If we lose privacy, what might we lose in the process? Can technology opt-outs be built into public spaces or does opting out paradoxically reveal oneself? And how might public policy address these issues?