So, you're loving the new gallery and camera options we saw on Jelly Bean 4.2 and have no intention of waiting for that OS for your former flagship Galaxy Nexus? A certain dmmarck on Android Central's forums has sorted that, and you can now grab the camera app for your so-last-month 4.1.1 OS on that handset. Other than a Photo Sphere bug, it's apparently working like the factory version, but newbies beware -- the installation requires some Android hacking chops. You can grab it at the source.
Samsung Galaxy Nexus