Quadrotor technology developed at the General Robotics, Automation, Sensing and Perception (GRASP) lab at the University of Pennsylvania is able to fly with better accuracy than anything we've seen to date. Their ability to run complicated formations is both beautiful and terrifying.
The beauty is obvious. They may sound like bugs and look exceptionally creepy as they do flips and run tight formations (the figure-8 is amazing), but they are "geek beautiful" in ways that few robotic devices have achieved. They are terrifying because the possibilities are endless. When possibilities are endless, it's the military that often makes them "useful."
