The update also adds a number of functional new features for your camera thanks to the Smart Camera app, which is part of the Amber update. Within the app you'll find things like Action Shot,which allows you to photograph a subject in motion and produce one photo tracking an entire sequence. The app will also let you change faces on a portrait until you find the best shot for everyone. Remember, the camera app is part of the update for Nokia models only.
In addition to the Nokia only parts of the update, there are a number of things coming in the GDR2 update, which is being sent out for all Windows Phone 8 users. This part of the new OS build includes an FM radio which is being enabled with the update, and the expansion of Datasense to more carriers. This application will help you track your monthly data usage, alert you to when the the next monthly billing cycle will start, and even tell you which of your apps are consuming the majority of your monthly data allowance.
source: UnleashthePhones via WPCentral