If you're the owner of a Samsung Galaxy Note 3 for AT&T, you should be getting your Android 4.4.4 OTA update starting today. This will bring you up from Android 4.4.2, and Samsung has packed in a few extras with this 459MB OTA, as well. Namely: Kid mode, SideSync 3.0, Knox 2.0, virtual tour mode in the camera app, and some updated AT&T bloatware.
The Uber app has been added to the list of things-AT&T-won't-let-you-uninstall, and I imagine there are a boatload of bug-fixes and the standard exploit patches you would expect in an OTA of this magnitude.
You can look forward to Android 5.0 some time next year. Hopefully. Maybe.