Me too. Watches and glasses. So not exactly excited about Google pushing their Google Glasses and Apple the Apple Watch. Waiting for Microsoft to come up with the Microsoft Braces!
3 times glasses have stopped something headed for my eyes. I kinda prefer having them on. I also wear a watch because when driving it's easy to check the time without having to dig something out of a pocket. It's also easy to surreptitiously check the time when you're bored :-)
Nope. But I have had cars with clocks, and they were unusable due to:
1. They stopped whenever the electrical system had troubles. So they were either behind or showed what was essentially a random time, because they needed constant resetting.
2. They were either woefully fast or slow.
3. They were digital (no hands) and small, requiring you to peer at them to read the time, taking eyes of the road for seconds.
4. They were accessible through a 'mode' button, which of course I never could remember how to scroll through the modes while trying to drive in traffic.
5. My analog watch I can read in 1/10th of a second with just a flick of the eye.
TL,DR: all clocks in cars suck. Not that they have to suck, they just do because of lousy human factors design.