Invisibility cloak

First up, we'll look at some wonderful carbon nanotube fashions -- fresh from the UTD NanoTech Institute fall 2011 collection. This new technology is inspired by the same natural phenomena responsible for desert mirages. Heated via electrical stimulation, the sharp temperature gradient between the cloak and the surrounding area causes a steep temperature gradient that bends light away from the wearer. The catch: Wearers must love water and be able to fit inside a petri dish.
Or perhaps you'd prefer something made from metamaterials. These tiny structures are smaller than the wavelength of light. If properly constructed, they guide rays of light around an object -- much like a rock diverting water in a stream. For now, however, the technology only works in two dimensions and only comes in the ultrapetite size of 10 micrometers across.
If you're more into retro fashion, there's also the optical camouflage technology developed by scientists at the University of Tokyo. This approach works on the same principles of the blue screen used by TV weather forecasters and Hollywood filmmakers. If you want people to see through you, then why not just film what's behind you and project it onto your body? If you travel with an entourage of videographers, this may be the cloak for you.