Sony is currently developing an usual watch that will use electronic paper in its entire body i.e. the face and strap according to Bloomberg. The emphasis of the product will be on style rather than cutting edge specs and could launch as early as next year.
The face and wrist band of the watch would be made from a patented e-paper material allowing the entire surface to act as a display. To understand the concept, the FES Watch is trying to crowdsource something very similar in Japan (see the gif below). Is this something you could be interested in? It certainly would bring a wow factor to Sony’s wearable offering.