Did someone say... HOLOGRAMS!?!

No? Hmm. I was probably just muttering it involuntarily, then. Happens all the time.

Seriously though, this is pretty cool. Sounds like their technology works by causing tiny droplets of water to condense out of the air, which are then used to diffract projected light. It essentially creates a screen of fog in midair, then paints an image onto it with light. Neat. With today's swamp-like DC air, I bet it'd work great here.