The effect of their demo was obviously faked through video editing, so I'm curious how the actual implementation will work. Will they embed some kind of see-th

The effect of their demo was obviously faked through video editing, so I'm curious how the actual implementation will work. Will they embed some kind of see-through display in the watch glass? Or will this be some kind of VR/AR where a Google Glass type device superimposes info on your watchface?