Dynamic Focus Format

I was pondering about focus bracketing, the other day. It turns out that some cameras already feature this feature - shooting additional shots with the focus either side of the focused point.

What about really going to town on this concept? Rapidly shoot a sequence with a progression of focus planes from about the nearest ascertainable object in the frame, to about the hyperfocal distance for the given aperture, to attempt to include infiinity. Let's say we manage to grab about 16 or 20 shots of the same scene, each focused at a different plane, in a progression.

Now let's say we have a file format that allows us to use this extra dimension - one which can interface with commonly found and assumed user-interface features to enable the user to manually pull the focus nearer or further away from the default (ie, that which the photographer actually selected as being the thing to focus on). With no user intervention, you see the shot the photographer shot for. With manipulation of the UI in the appropriate manner, the user can be given the impression that they are able to change the focus of the picture.

This would work best on the web, and probably cause user interaction difficulty with actual prints of the photograph.