The idea here is that you won't have to mount speakers to your walls for surround sound, which might not be optimal based on where you decide to sit in the room. Instead, you attach each of the speakers (except maybe the subwoofer) to drones and then position them wherever you want so they are at the optical location and face the optimal direction every time. Also, they become portable, so you can take the surround sound wherever you go.
Also note that you only use surround sound speakers for the duration of the movie or maybe 3 or 4 hours for a party, which is probably feasible for the battery life of a drone
These drones with speakers on them could also be used in the dark to scare people into thinking that a house is haunted.