Back when I used to wear a watch, my favorite brand was Fossil. The watches tended to look cool and they were affordable whereas watches for some of the other major brands were often hundreds of dollars. Fossil has a new concept watch that can connect to your Android device via Bluetooth and show you all sorts of data so you can leave the phone in your pocket.
The downside is that you have to start wearing a watch again. I haven't worn a watch in years. The watch is a secondary screen that will shoot over details like weather, caller ID, and email from your phone to the watch screen.
Why would you want that? The idea is so that you can see who is calling you or texting you with your phone in your pocket. I can see this being something that would be useful when driving so you can't have to dig the phone out of your pocket. That said, there big downside of the concept device is that the tiny screen means you need to do a lot of scrolling to read a text and if you get long texts it's not going to be worth it to most of us. Still the concept is cool and some will find it appealing.