The new DØGN watch from Cognitime is certainly a thing of beauty:
It features an ingenious figure-of-eight display for the hours, surrounded by a circular minute dial. The segments light up according to the time: 12 noon and midnight meet in the center. The first 12 hours of the day are shown by an illuminated segment that marches counter-clockwise round the top circle, and the second 12 hours of the day marches round the lower circle.
It’s also got some scheduling and calendar features, but I haven’t been able to find out much about how these are supposed to work.