3) Some testing of some parts of something like https://rationalwiki.org/wiki/Project_Blue_Beam , meaning chasing holographic apparitions projected somehow from somewhere.

Or simply several invisible beams of whatever making the air glow/shine where they cross, sweeping, and theryby moving that spot.

No real new physics at all, except of the massively improved capability to project holograms over vast distances.

Edit: Think of a cat, chasing the dot of a laser pointer.

Meow!