This update has now been confirmed by Samsung for both devices. The updates will come anytime from July through to September of this year. This is further ahead than the previously expected time frame which was during November. Why exactly the time was brought forward is not yet known.
It does open the door for thought on what might be coming later on this year after the 4.2.2 update. It is possible that users could be operating on the Key Lime Pie firmware before the year is out.
The update will roll out around the same time for both of the devices mentioned.
What can I expect from this update? The update will likely come with Google now, which featured during the Google I/O event held a few weeks ago which we have streamed live from the site. Some cool new camera features are also expected to come with the update. Other notable features include the project Butter as well as heaps of new apps.