[apu]

Lytro is also "just" simulating it, but with slightly more/different data. They capture a light field but that doesn't magically give them depth values; they have to estimate them using an optimization, and then render the final image using a very similar algorithm.

[ISL]

Edit: Whoops: I mis-read the article; 'Lens Blur' uses multiple frames. That lets you get a lot more information.

[ISL]

Well, The Lytro will still win on moving subjects where a sequence convolves subject motion with the depth map.