video images projected into the air

This is a clever little project. 
It apparently works by dispersing a relatively flat, relatively invisible spray of
particles into the air, and projecting a video image on that.  They seem to go
to some lengths on their web page to not talk about those little particles; which
makes sense to me – it sounds like a pretty imprecise substrate for a video
screen.  It sounds better to just say “it’s projected into thin air!” 
Still, if it works, the marketplace may forgive the foggy nature of the technology. 
The videos certainly look cool.

“Help me, Obi-wan Kenobi – you’re my only hope!”