The person who started this project wanted a small, rechargeable, smartwatch that displayed notifications from his iPhone. The project is a Bluetooth enabled smartwatch with a 3D printed enclosure and touch buttons.

I thought this project was really impressive because it packs a lot of functionality for such a small device. Although there are many Arduino projects that solely focus on functionality, it is really obvious that the person who made this smartwatch really spent time perfecting the aesthetics and practicality of the device (nobody would use a huge smartwatch).

You can find the project here:

http://www.instructables.com/id/Arduino-Apple-Watch/