So the camera app updated last night for me on my Nexus 5.
Interesting update which completely changes then interface.
One new feature is the Lens blur which allows you to take a close snap (within around 5 feet) and blur the background by taking a short vertical sweep as you take the shot keeping the object/person/cat centered.
This is interesting because the new HTC One M8 has an extra pair of ‘eyes’ with its camera specifically for measuring depth in a shot and adding computerized blur to emulate depth of field. I haven’t looked into the HTC into much depth however, this feature on my Nexus 5 seems to have some promise.