The system Fog-
Screen is a projection technique on a cloud water (fog). The effect is magical. You have the impression of being in front of a hologram.
Applications become multiples for everything concerning dynamic display and interactive communication in passage places (the audience sees and goes through the hologram without be wet).
Coupled with various complementary products of interaction, you can:
Write and draw in air
Use a computer by simply touching the air
Create interactive kiosks
So, a passive projection screen becomes a huge interactive touch screen, whose potential uses are very extensive.