Anyone remember Jessica Alba in Dark Angel? It was a near-future sci-fi show where she played a genetically enhanced Robin Hood-ish character.
Anyway in the show the “Sector Police” used these hovering drones to keep tabs on the populace (and sure, the idea has been used elsewhere). It gave the show a good ‘future vibe’ so to speak.
Anyway, getting to the point… be very afraid because we have another sci-fi to sci-fact story here: Hovering drone could report for work at Miami police station – Engadget