That exists! Saw it demonstrated on some science show. They are being developed as companions/monitors for the elderly living alone. They're fitted out with movement sensors and can follow them around and call help if the oldie falls over. Incoming calls from vid/phones allow the face of the caller to show on the screen so the oldie can feel they are 'with' the caller and photos etc can be displayed.r. Other times the screen displays reminders of medications etc.... all in all a pretty fine gizmo, hate to think what the cost would be though.