Besides the new features that come with Android 4.1.2, the update includes new additions in the Notifications toggle area, such as the ability to turn multi-windows on or off. The whole Notifications panel can now be customized and the brightness control, for example, can be disabled. The color of the status bar has been changed from grey to black and there is a new optional ink effect on the lock screen.
Those with the international version of the Samsung GALAXY Note II and the Samsung GALAXY Note II LTE will find the browser to be smoother after the update and the Samsung QWERTY keyboard now includes a Swype style of typing. The new Group Cast feature allows you to share photos and music with those who own another Samsung device.
The update is said to be rolling out right now in Poland (Samsung GALAXY Note II) and in Sweden (Samsung GALAXY Note II LTE). Eventually, the update should go global and will be available OTA or via Kies.
source: SamMobile via AndroidCentral