Lytro lets you take pictures like never before. Unlike a conventional camera that captures a single plane of light, the Lytro camera captures the entire light field, which is all the light traveling in every direction in every point in space.
In short, this camera captures photos with full light spectrum and a decent resolution, allowing you to focus
after you took a photo. Like I said, a pretty awesome idea, but it really takes the skill out of photography. I foresee a torrent of Hipsters who have $400-odd to burn.
More info.
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Here's a CNET review: http://news.cnet.com/8301-17938_105-20125910-1/lytro-camera-5-things-to-know-before-you-buy/