By David Dvorkin
Published: July 1, 2013.
Walls have always given us privacy, safeguarding us from the eyes and ears of others. That’s about to change. Surveillance drones the size of insects will be superseded by surveillance devices the size of specks of dust floating in the breeze. They will watch us, but they will also let us communicate with each other in ways that no government or corporation will be able to intercept or block.