Squids, octopuses, and cuttlefish have the most remarkable skin qualities that let them blend into their environment. Watch this video and play “find the octopus before it finds you.”
So how close are we to "disappearing"? Some work on artificial chromatophores came out of the University of Bristol last year and looks a little something like this:
Here’s a cool example of a real invisibility cloak in action! It’s not going to fool anyone walking around in it, but applying this to reduce blind spots while driving is a spectacular idea.