There are some fun projects that you could do with this. Although for wearable I guess it is a lot harder to really do something cool yourself. Wearable Arduino already handles things like wearable lights. This would be more for having a secret screen inside your coat to watch movies on.

Maybe there needs to be a lap band that talks to the phone!

Youtube Video

Yes. Hence why it is potentially quite beneficial. I would use something like that to tell the time.