A distributed projection system comprising a plurality of projection units each projection unit comprising: a rotating capture module comprising: at least one color camera, at least one microphone, and at least one depth camera, the rotating capture module being configured to capture images of a room in which the projection unit is situated; a rotating projection module configured to project images onto at least one surface in the room; a communications component configured to communicate with at least one other projection unit; and a processor configured to use data captured by the rotating capture module to automatically select the at least one surface in the room on which to project the images, the selection being dependent on a field of view of at least one user present in the room and on characteristics of surfaces in the room; wherein the processor in each projection unit is further configured to control a rotation of the rotating capture module such that the data captured by the rotating capture module is suitable for computing the field of view of at least one user present in the room, and for determining the characteristics of the surfaces in the room, and wherein the processor in each projection unit is further configured to control an operation of the rotating projection module to project the images onto the at least one selected surface in the room; characterized in that: the rotating capture module in each projection unit is independently rotatable with respect to the rotating projection module; each projection unit of the projection system is situated in a different room of a building; and the communications component in the projection unit situated in the room where the at least one user is present is configured to send a first status message to the at least one other projection unit situated in a different room, said first status message comprising at least an indication that the user has been detected, and to send a second status message to the at least one other projection unit situated in the different room, said second status message comprising at least an indication that a room change is likely and details of any content currently being projected. a rotating capture module comprising: at least one color camera, at least one microphone, and at least one depth camera, the rotating capture module being configured to capture images of a room in which the projection unit is situated; a rotating projection module configured to project images onto at least one surface in the room; a communications component configured to communicate with at least one other projection unit; and a processor configured to use data captured by the rotating capture module to automatically select the at least one surface in the room on which to project the images, the selection being dependent on a field of view of at least one user present in the room and on characteristics of surfaces in the room; wherein the processor in each projection unit is further configured to control a rotation of the rotating capture module such that the data captured by the rotating capture module is suitable for computing the field of view of at least one user present in the room, and for determining the characteristics of the surfaces in the room, and wherein the processor in each projection unit is further configured to control an operation of the rotating projection module to project the images onto the at least one selected surface in the room; the rotating capture module in each projection unit is independently rotatable with respect to the rotating projection module; each projection unit of the projection system is situated in a different room of a building; and the communications component in the projection unit situated in the room where the at least one user is present is configured to send a first status message to the at least one other projection unit situated in a different room, said first status message comprising at least an indication that the user has been detected, and to send a second status message to the at least one other projection unit situated in the different room, said second status message comprising at least an indication that a room change is likely and details of any content currently being projected.