I was sent this link
about a new technology, developed by Zink, that is an instant color print technology that doesn't use ink ('Zink' = Zero Ink.) It has 3 emulsion layers in the paper that each change color and liquify when heated to a specific level. Polaroid has just adopted this new technology to a new portable printer that can be connected to a digi-cam's USB port. I can also envision a digi-cam with the printer built in. And larger format printers, too.
This has the promise of being a 'disruptive technology' in the way that light-sensitive polaroid was in an earlier era.