Rarely does the first leaked firmware update for a flagship phone end up being exactly what rolls out to users, but that appears to be the case for the recently leaked KitKat ROM for the Note 3. Android 4.4.2 (N9005XXUENA6) is appearing in Poland through Kies right now, and the version number matches the leak from this weekend.
Samsung made a few notable tweaks in KitKat for the Note 3, just like it did for the ROM for the Galaxy S4 leaked a few days earlier. The status bar icons are white now, and the camera shortcut on the lockscreen is similar to stock Android. benchmark scores are reportedly a touch faster after the update. The TouchWiz UI should be revamped a bit as well.
The SM-N9005 is the Snapdragon-powered international GSM/LTE model of the Note 3. This update probably won't work on any of the US versions, so don't get your hopes up. US carriers tend to take their sweet time with Android updates, so it might be a little while before KitKat reaches your US Note 3. If you've got a compatible device but aren't in Poland, you can grab the update file and install it manually.
Update: Video and changelog:
SamMobile has the full list of changes in the form of a Powerpoint presentation.