Mainly because of the great rise in interest in what are basically remote controlled flying video camera's, which is what most folks are getting them for anyway, the FAA are beginning to get twitchy and likewise the UK equivalent.
I reckon for outdoor flying there will soon be a requirement for a license and some fairly strict rules about where you can fly. There are already rules in place regarding the flying of model aircraft, especially near air ports or military bases which a lot of folk possibly don't know about.
There was recently an incident where a remote controlled drone of some type or other interfered with the safe landing of an aircraft, so expect the authorities to start reacting.