SyncSky (by Tsujita et al, 2007)
SyncSky includes a pair of Web cameras and projectors. The camera is attached to the wall beside the window of a room to capture the sky and the scenery around the window. The projector of the remote partner displays the captured image on the ceiling of the other person’s room.
Source: Tsujita, H., Siio, I., and Tsukada, K. 2007. SyncDecor: Appliances for Sharing Mutual Awareness between Lovers Separated by Distance. In Extended Abstracts on Human Factors in Computing Systems (CHI’07). ACM Press, 2699–2704.
http://lab.siio.jp/index.php?SyncDecor