Already some time ago that I have been listening to that with mobile phones carrying wristwatch has its days numbered. In some ways yes.
What watch manufacturers should do is to advance the technology of these to try to integrate more functions than traditional. The mobile for example could be in your point of view.
The Citizen W700 is the latest watch with Bluetooth of the famous brand watch, which is able to warn you if you have an incoming call and shows you the ID of who done it.
It will be available from March at least in Japan.