I kinda want one of these:

Lytro, the world’s first light-field camera, made its debut today at an event in San Francisco. The camera records fields of light instead of pixels and allows users to focus after they’ve taken a picture. We’ve talked about the technology behind this camera previously, but this is the first time we’ve seen the camera’s unique form factor.

While standard digital cameras collect light data into a flattened image comprised of pixels, the Lytro keeps all the information separate. The sensor records color, intensity, and vector direction of all the rays of light and then assembles that information in post-processing.

With this technology, users do not need to focus as they’re shooting photos since they can focus on any part of the frame after the image is taken. And since there’s no processing in between shots, it eliminates shutter lag, and even boasts less than a second to power on and start shooting. via Slashgear

Another good article here at techland

More about the science inside here at Lytro