1. An interactive video window display system, comprising: a projector configured to project a visual image; a screen behind a window having a front side, the screen configured to display the visual image, wherein the visual image is projected onto a back side of the screen for presentation to a user on a front side of the screen; an illuminator configured to illuminate an object on the front side of the window; a camera configured to detect an interaction of an illuminated object with the visual image, the interaction occurring within a volume of space in front of the window, wherein the screen is partially transparent to light detectable by the camera whereby the camera may detect the illuminated object through the screen; and a computing device configured to direct the projector to change the visual image in response to the interaction of the illuminated object with the visual image, wherein the projector, camera, illuminator, and computing device are located on the same side of the window.