"Today, a handful of soldiers with advanced gear can see a few digital maps, through helmet-mounted monocles. Some pilots can get data about their world, on heads-up displays. But one day, troops could see an info-"augmented" reality all around them, with contact lenses that provide "first-person shooter-type video game" environments to those that wear them. At least, that's the idea behind the latest project from DARPA, the Pentagon's blue sky science and technology division.
The materials behind real-life invisibility cloaks could even factor in, sorta. DARPA is talking about spending $3 million next year on "transparent displays" -- and you'd certainly want your Halo 3-esque contacts to be transparent. The key to those displays would be "metamaterials," the strange substances that can bend certain frequencies of light around them. "