Yes, the photo sphere is part of Android 4.2.x. I'm using the Gnex running Sourcery 3.2 (Android 4.1.2) and it has the ability to add a couple of Android 4.2.x stuff, this new camera is one I added. I am not sure how it will work for the SIII, but suffice it to say that SUroot is right. Rooting and/or a custom ROM would be the pre-requisite.