The photo frame takes spontaneously pictures and sends it to the remote picture frame. The photo frame displays the most recent one and from two hours ago. Also, it can display one favorite picture selected by the user. Keeping looking on it, the photo frame recognized the explicit action and displayed an icon to indicate this. Meanwhile, the remote frame begins to flash and sound an alert. If the user is busy and just glances on it, the frame spots the glance, silences the alert, and displays an icon on the partner’s frame to indicate that the call had been declined.
Source: Hemmeryckx-Deleersnijder, B. and Thorne, J. M. 2008. Awareness and conversational contextsharing to enrich TV-based communication. Comput. Entertainment 6, 1, 1–13.
