Check out these videos of Holographic displays by Leia Display System...
Below is what the creators at LDS had to say about this new tech:
Leia Display System (LDS) are the devices that allows to display images in mid air. This unique technology makes possible to walk through the images, tough it or interact with it. Streams of bearly visible fog becomes an image carrier and their laminar structure allows to display hi resolution contents. Our patented way to produce laminar airflow for a very long distance from the output makes Leia Display the most steady midair screen on the market.