I’ve just seen one of the coolest gadgets I’ve ever imagined. It’s a
plenoptic camera, developed by a student at Stanford. This digital
camera not only measures the amount of light coming at a specific
point, but also how much light arrives at each ray. What this means is
that you can take a single shot and change the depth of focus
AFTERWARD, in software. Imagine the implications. 

This is the same single shot, with only the focal depth changed afterward! 

Would it
be too much to ask for the same thing in a videocamera? Probably.
Although it’s arguably the next step in the evolution of photography,
slightly before 3D and holography. You can read more about it, and
check out some killer examples, here.

Here is also a link to the Wired Article about it.