Techniques are disclosed that generally relate to content delivery techniques in audio-visual systems. In an audio-visual system, a method of using sensors to incrementally present content elements on a display includes presenting a first content element on the display, receiving first data from a sensor, the first data associated with a first distance. An increment coefficient is identified, and a portion size is determined by reducing the first distance by the increment coefficient. Finally, an unseen portion of a second content element is incrementally added to the display, and a presented portion of the first content element is incrementally removed from the display, the size of the portions added and removed being equal to the determined portion size.