Technology commonly used in ‘Stealth Drones’ has been adapted for consumer products. This now allows users to
control products via their smartphone and similar gadgets, using Wi-Fi and cameras. Some of these nifty devices are retailing at around £280 in the UK. 
The well known tech site, Gizmodo, commented "You start to think about what you’re really dealing with – a flying robot, controlled by your phone, with a camera that records the world below as if you’re sitting in a tiny cockpit."
HOW IT WORKS
Streaming real time video to its controller allows them to see where they’re flying. Sync up is simple after downloading the free App; Turn on your device such as an iPad and then connect to the AR Drone. The AR Drones (Quadricopter) also appear to be secure and stable, for example, the devices automatically level themselves out and if the unit loses connection to the remote it will stay in one place. It’s easy enough to get connection again though- just walk around.
The most common uses of the AR Drones are seen in augmented-reality games (where users can control the game holding their Smartphone) and high quality aerial photography. In addition, creative's in the marketing industry are becoming wise to the possible opportunities for live events and campaigns.
More compact drones have also been developed which are fitted with memory chips and improved GPS functionality, “potentially opening the way for targeted messaging and delivery to customers.” 
http://www.flickr.com/photos/epredator/4960850038/ By epredator Ian Hughes