Light-field photography
bit-player.org
bit-player.org
As a hobbyist photographer who enjoys shooting in low-light and is frequently disappointed by focusing errors, I totally see the value in the concept of the Lytro (my most recent disappointment being unable to correctly focus the smoke in this shot and having to post-process to bring it out more, but still not well enough: http://www.flickr.com/photos/lusr/6830872670/).
Too bad they don't ship internationally yet, although I feel the current lack of manual controls for shutter speed and ISO (and the presumably lower-end sensor) for this first revision would probably be disappointing if I did order it.
Imagine a camera that constantly records video at a very high frame rate. You can then "go back in time" to pick a moment, and the creative decision of choosing the shutter speed can be done at that point. Technically it's just a matter of blending a range of frames around your chosen moment (a fast shutter uses just a few frames, whereas a slow shutter would combine dozens of frames to create your image).
Of course at that point the camera's image buffer fills up and the speed of your storage and the compression engine becomes the bigger technical challenge.
Whether you can take decent resolution photos on a device priced at consumer-level at a reasonable rate (without much of a delay between shots) becomes an interesting question and perhaps an interesting camera feature. If I had a Canon I would use CHDK to experiment with this.
While I completely agree with Luis C.K, I also like when somebody actually propose something cool to create.