I was thinking of a form of advertising, specifically for malls where the ads shall float in mid air in the middle column of the buildings where there is nothing. A projector type device will be placed on the ground floor and shall create virtual screens that shall advertise the shops and brands within the malls. If possible, each floors ads will be specific to the shops on those floors. In that case, the ads shall be silent. If the ads are not floor specific, they can have audio also as the same ads shall show on each floor. This will help shop owners advertise their products and offers more effectively to the visitors. The impact shall be much more intense and sales shall increase in great magnitudes if done properly. The idea is loosely based on the "Tele-presence" technology by cisco. I would like to know your thoughts on it and if this has been tried before.