Does CS6 have a feature to extract an object from a background using stereography?
I recall reading an article prior to CS6 releasing that Photoshop (or perhaps another CS6 product?) would include a feature that would allow taking a stereographic photo of an object, and then detect the foreground object from the background, thus allowing clean extraction of a photographed object from the background.
I don't own CS6 yet, but I can't for the life of me find this article again. Does this feature exist in CS6, and if so, what is it called?
No, unfortunately that isn't in CS6 (or CC as far as I can tell). If you're on a PC here are a few utilities for making depth maps from stereographic pairs though. Those may give you a starting point at least.