Lytro Light Field-Based Photography by introducing an micro-lens array that uses different focal planes on a single sensor. Lytro cameras have constant f-stop at f/2.0, but yet you can shot now and focus later. Since they use basically thousands of little cameras, they can produce 3D images as well.
The Lytro Illum is their second generation camera built more for the professional and the hobbyist
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Pelican Imaging is looking to produce Depth-Based Photography by introducing 16 cameras at different focal planes. Similar to the Lytro, but focuses on giving you a depthmap or pointcloud to use as a 3D scanner or to print straight to a 3D printer. They will even allow for video recording and even have all of this on your smart phone.
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