1. A system for creating a free-space display comprising a heat pump, means to introduce ambient air through the heat pump, means to create a thermal differential in the heat pump, means to extract condensate from the ambient air using the thermal differential, means to pass the condensate into an expansion chamber, means to atomize the condensate in the expansion chamber to create particle cloud material, ejection nozzle means to eject the particle cloud material into the air to create a particle cloud screen, means to eject a parallel laminar air stream enclosing the particle cloud, means to generate an image or images, projection means to project an image or images onto the particle cloud screen.