Earlier today, I wrote that Amazon probably would like its next Kindle to be in color. This afternoon, I found out about M-Ink. M-Ink goes onto a surface as one solid color, but it can become a full-color image by changing its physical structure. It reminds me of those cans of paint in Warner Brothers cartoons that would come out polka-dotted when you spread it on a wall.

Here's a short video showing it off:

I bet Amazon wants to get its hands on M-Ink.