A company called IO2 Technologies is selling a display unit that can project a three D image onto an airborne film of moisture.
According to CBC the device captures the light from a projector to allow the images to take shape.
It is possible to use the 3D image as a computer interface by using 3d windows that morph into touchscreen displays.
CBC reports that users can grab and shuffle images around, zoom in and out to see the minutest of details, or simply wave their hands over an image to make it come alive on screens as large as 100 inches or 254 centimetres.
The
Heliodisplay from IO2 Technologies can project any kind of static or
moving image, from photographs to movies, without the need for a solid
screen.
More here.