The latest out of the rumor mill is that the Samsung Galaxy S3 might end up getting some of the same features that are said to be coming in the yet-to-be-released Galaxy S4. These rumored features include the new Smart Scroll feature that will automatically scroll webpages and other text areas automatically.
The screenshot seen above is said to be from a Galaxy S3 device running a leaked Android 4.2.1 update. If this is indeed a true Galaxy S3 update, then I would expect to hear more about it at the March 14 event being held by Samsung to announce the Galaxy S4. At that time, they'll probably give a timeframe for the update to roll out to the international version of the device.