[Philip Lelyveld comment: this ability to slightly change position allows Lytro to also create 3D images.]
Photos taken with Lytro's light field camera (aka living pictures) were already more interactive than a regular snapshot, letting you endlessly refocus the images by clicking on different parts of them. An upcoming software update takes the interactivity up a notch, letting you change the perspective of your shots, too.
The free Lytro Desktop software update, which rolls out December 4, adds this Perspective Shift feature, enabling Lytro users to slightly change the point of view of a living picture by clicking and dragging them in any direction.