iPhone-Controlled Helicopter With AR Games
andylim writes "Parrot has unveiled a remote-controlled helicopter that boasts augmented reality games. The helicopter is controlled using an iPhone or iPod Touch's accelerometer and touchscreen. There's a camera on the front of the helicopter, which you can use to navigate and to play augmented reality games, including a game that involves fighting a gigantic robot."
You hit the nail on the head: the problem is power/weight. Looking at the specs http://www.parrot.com/parrot-ar-drone/en/how-does-it-work#start/ it looks like the batteries are expensive lithium-ion-polymer with "15 minutes battery autonomy", which I assume is a fancy way of saying that you get 15 minutes run flying time between recharging.