Robot Invasion: Drone Edition

From Wired:

Israel's Heron TP

Drones have had a profound effect on the way America fights its wars, allowing it to fight in new theaters while minimizing the risk to troops. The U.S. has used drones for decades, with early versions flown during World War II and the Vietnam War. But over the past decade, the Defense Department's development and production of drones has rapidly increased. The U.S. military has gone from having just a few drones at the outset of the Iraq War to now over 7,000.
And we're not alone, not by a long shot. The lure of enduring overhead surveillance and strike capability at a safe remove -- and at a relative bargain -- is just as appealing to the rest of the world's militaries as it is to us. Sure, American drone technology is a sought-after brand on the international arms market, but other countries have and increasingly are developing their own platforms. Allies like Israel and adversaries like Iran have used reconnaissance drones in combat since the 1980s and continue to turn out new models. China is taking its lead from American drone models with knockoff Predators and Global Hawks.
Today, more than 50 countries are using or developing unmanned aerial vehicles, or UAVs.

My grandpa was working on Mini-RPVs in the 70s, and maybe before.  I think he had a hand in the prototype of what became the Global Hawk, in the late 80s.  I wonder when these will become commonplace in domestic surveillance.  I'll guess 10 years.  What do you think?  Sooner?