E Ink is showing a huge (meter-long) clock. This was actually built by E Ink a few years ago - just as a prototype, but now Twelve24 wants to make it into a product. They call it the ClockOne and will offer it soon for around $499, in six different colors.

Huge, expensive, and not very readable, it seems...

ynvisible ink kit - create your own electrochrommic printed displaysynvisible ink kit - create your own electrochrommic printed displays