Interesting documentary (h/t Naked Capitalism) on the generalization of cheap small drones (robotic air craft) for all.
They will be legalized for commercial uses in the USA in three years but the reality of privately controlled drones exists already and legalization appears to be a mere rubberstamp on a fait accompli.
While the drones may indeed be a risk for privacy (and are already being used in that way by police and military forces), like the now-ubiquitous cameras there are two or more sides to them and can potentially be also used by investigative journalists for example, denouncing authority abuses.
Whatever the case, it seems that they will be a common sight in the skies very soon. If you can even spot them at all.