1. A touch sensitive image display device for projecting a touch sensitive displayed image at an acute angle onto a surface, the device comprising: image projection optics comprising at least one light source; a remote touch sensing system to remotely detect a touch of a location within or adjacent to said displayed image and having a touch data output to provide detected touch data; and a display system to drive said image projection optics; wherein the device further comprises: an image data input to receive image data defining an image for display; wherein said image projection optics comprises a spatial light modulator (SLM) illuminated by said light source and output optics to project modulated light from said SLM onto said surface at said acute angle; and wherein said display system includes memory for storing said data defining said image for display and an output for driving said SLM to display data on said SLM to replay said displayed image on said surface; and wherein said remote touch sensing system further comprises a touch imaging sensor, and a system to: input touch data from said touch imaging sensor for identifying said detected touch of a location; apply anti-distortion processing to convert said touch data to provide anti-distorted detected touch data; and provide said anti-distorted detected touch data to said touch data output; wherein said remote touch sensing system is an optical remote touch sensing system comprising infrared illumination optics located proximate said surface on which said image is displayed to provide illumination of a region above said surface on which said image is displayed; wherein said projection optics are front-projection optics configured to project onto the same side of said surface as said illuminated region; and wherein said touch imaging sensor is configured to detect light from touching said displayed image through said illuminated region.