I can see these being used in emergency situations, but there's a reason all their promo footage has music. All urban drone applications are DOA if they don't address the noise issue.
See, you've gone and confused the concept with a music video. In order to avoid the drone noise issue, they've installed loud speakers with the lights that play the music you're hearing. Just like when you turn up the radio in the car to make that belt squeaking noise go away.
You've just confused the concept with music added in post when that's actually what it'll sound like when fully deployed.
