Cameras with Background defocus feature

Here's an explanation and sample from CNET.

The camera takes 2 images in quick succession, identifies the background, electronically blurs it and then merges it with the foreground subject to form a single image.

Obviously, the degree to which it works depends on the distance the subject is from the background.

I might add that it does all this in the space of a 1-2 seconds!!!

http://reviews.cnet.com/2300-6501_7-10008197-14.html