Rotaclock -- a unique clock where the whole wrist display the time
(This post didn't originally get published due to technical problems with the graphics. It was written in 2007 and was rescued & inserted into the archive in 2015.)
Imagine a wristwatch with nothing but the wristband. Time flows around your wrist; parts of the wristband light up to indicate what time it is, and you can watch seconds race loops around your wrist.
The concept may need some tuning, as some of the readings are awkwardly behind your wrist. Perhaps there's a gap there that the indicators jump over, around the closing mechanism of the wrist band.