Page Buddy: Your phone will smartly predict what you intend to do according to your actions. For example, when you plug in your earphones, the device automatically opens up a page with the music player.
Contextual Menu: When you list up apps, you can now choose to see the most frequently used ones first. Especially convenient when you’re looking through apps to find files to attach.
Contextual Tag: When you take a picture on the phone, you can tag the weather, date, and place immediately.
Multi Window: You can open two different apps at the same time into two different windows on the mobile screen.
Auto Share Shot Pairing using NFC: By setting the camera to ‘Auto Share Shot’ mode, you can quickly share your photos and videos by simply tapping their GALAXY S III with other NFC and S-Beam enabled devices
Reader Mode: You can easily control the size of the text on your browser! Also, you can just click the webpage to share it!
Facebook Lock Ticker: The easiest way to see your Facebook News Feeds – set your phone to show it on your lock screen.
It's a pretty awesome pack to have arrive on an already great device but alas, the typical disclaimer applies here. Samsung notes that availability and timing of the Premium Suite upgrade will vary depending on the country and mobile carrier.