[dTal]

Let's be clear: this is not real. It doesn't "make use of" drone speakers because it's fictional. This is someone saying "wouldn't it be cool if we had drone speakers" and paying a digital artist to knock together some renders. The piano might exist, but those drones don't. They aren't even a viable design - broad, flat supports and a wide flat gondola right in the air stream? Single hub? What stops it from spinning, are we meant to think it has counterrotating blades (cuz they are hella noisy even by drone standards)? Where are the blades anyway?

Nonsense. Fiction. Not even plausible fiction. Might as well have them hover by magic. HN, move on.

[xrd]

Well, I wish I could see it at CES (as they state it will be) to confirm or disprove your assertions.

Can't you just have an extra noise cancelling drone that creates an equivalent cancellation sound wave?

Even if it is "fiction," it fits into the "science fiction" category and I love it as such. The rendition is such a beautiful idea that I'm happy they created the web page to showcase the idea.