
Introduction
Samsung dedicated this year's IFA solely to its smart wearables and introduced the Samsung Gear S3. It's a smartwatch that improves on both halves of its name - it looks and feels much more like a traditional watch, while functionality is on par with a smartphone.
The Gear S3 is powered by Tizen - Samsung's Linux-based platform that doesn't get much love on phones but shines on your wrist. It's detached from Google's gradual process of adding new features, allowing the Gears to be a step ahead.
Samsung has created two versions - Classic and Frontier. They are mostly identical, though the latter earns its name with its more adventurous nature.
Another separation is Wi-Fi only and 3G/LTE. The watches now come with a speaker and a microphone as standard, so they can handle voice calls - the watch can make the call itself or just serve as a hands-free for your phone. Note that only the Gear S3 frontier will have a 3G/LTE version. If you want Wi-Fi only, you can pick between the frontier and classic.

Samsung did a lot to make the watch more independent from the phone too, with the Gear S3 you'll rarely have an occasion where you have to take your phone out.
Samsung Gear S3 at a glance:
Chassis: 316L stainless steel; IP68 water and dust proof
Bands: Leather/rubber; standard 22mm bands work too
Display: 1.3" circular, 360x360px, Gorilla Glass SR+; Full color Always-on display
Platform: Tizen OS; iOS support in open beta
Battery: 380mAh, 3-4 days (double that with battery saver)
By the way, the Samsung Gear S2 will remain on sale since Samsung thinks it and the new S3 will appeal to different audiences. Size is the defining factor - despite the small difference in screen size (S3: 1.3", S2: 1.2"), the new Gear S3 is much bigger.
Another thing: right now, the watches support Android phones, but iOS-support is in open beta in Korea (there's no ETA, however).