Samsung is only just now pushing Jelly Bean out to some of their Galaxy S III owners, but it looks like round two is coming with SamMobile reporting that Android 4.1.2 is being pushed out to the international 3G models.
The new update is said to include multi-window support, something we saw on the Galaxy Note 10.1 tablet. Something else to be excited for is the Galaxy Note II's gallery application, Smart Rotation and other apps and features may also be included.
Don't worry if you haven't received a notice of an update yet, as the rollout is only just beginning. Do let us know if you get the update and notice the multi-window support and various other features.