[JennysCool]

As I posted on another thread, I'm leaning towards the idea that these "drones" are actually very sophisticated holograms. They often tend to be described as "floating" when they're not making some kind of direct motion, and they don't seem to actually DO anything besides look ominous in the sky. It seems more like a presentation, than an invasion.

It's the sort of thing producers of a movie about "killer drones" would do to gin up publicity, using Elon-level technology.

[GMThrust]

They may be practicing for the “real alien invasion”. Hologram projections have become very sophisticated and what a better way to project an image for the whole world to see.