According to the DisKingdom blog Walt Disney has applied for a patent on "Air Delivered Special Effects." This would entail using drones, or as Disney calls them in the patent application, Flying Robots, to deliver a variety of special effects such as pyrotechnics, confetti and smoke. Imagineering is clearly trying to "plus" the fireworks and even evidently daytime shows with drone....oops, I mean Flying Robot, launched effects. How cool would that be?
I can only imagine what they will able to do, but as the blog points out, one goal may be to elevate the performance of fireworks to expand the viewing area. If you launch your fireworks from a few hundred feet, they will explode that much higher and be visible from that much farther away.