They aren't just for the military anymore. Within the next few years, the skies could be full of private drones -- searching for everything from real estate to Britney Spears.

Pentagon indicates unmanned aircraft are the future.

Facing nearly half a trillion dollars in mandated budget cuts over the next 10 years, the U.S. Defense Department will spend more on technology like robots and drones -- and less on soldiers, ships, fighter planes and other conventional weapons.