Nixie Watch uses Nixie Tubes to display time the very geek way.

The Nixie Watch goes beyond LED wristwatches by using old fashioned tubes to display time.
The two Nixie tubes used in the Nixie watch are the widely available B-5870 type and are socketed for easy replacement in case of damage. The watch even has a programming adapter allows the GPL'd PIC firmware running the watch to be hacked. The case is made of lightweight aircraft aluminum. The size is 2.2" (55mm) diameter and it is 0.79" (20mm) thick. The battery life is approximately 4 months at 50 viewings per day, no seconds display.

Japan's favorite cat Doreamon is now also smiling from a USB memory wristwatch.
The Doreamon memory watch are actually from Austrian watch company LAKS. There is a 64MB model and a two 128MB models.
The Doratch label has also several other watches featuring Doreamon

As reported Toyota will start to offer a smart key wristwatch for their Toyota Crown cars starting next week in Japan. Actually there is already a company in the Netherlands called Camco Systems that sells a wristwatch that opens cars remotely and also can start the engine and much more.

The Camco Systems Prostar has actually tons of features (see list below). It can even check the temperature inside the car.
The Camco Prostar car alarm watch sells for 239 Euros and can be installed apparently in any car. There is also a funny video showing the Camco System watch in action.
More details on the Camco Systems site. (Thanks Gregory S.)