Ascending Technologies showed off some of their technology during the Super Bowl Halftime show. If you have seen the video, the formations look awesome in the night sky. The only issue was that the sequences were taped days prior to the Super Bowl and Lady Gaga was likely standing in front of a green screen when she "leaps" into the stadium. To the trained eye, it seemed a bit staged and unfortunately, it detracted from the difficulty and challenges of flying that many UAV's. A few Intel reps talk a bit about the project details in the following article. Enjoy.
Link to Article: The Intel(AscTec) Drones Behind the Super Bowl Halftime Show