Samsung Galaxy S III. Design 2.0 covers everything since, including the Samsung Galaxy S4, which uses Sammy's Nature UX. It is hoped by those who are partial to smartphones made by the Korean manufacturer, that Samsung moves away from its use of plastic no matter how durable it is. Pick up a Samsung Galaxy S4 and an HTC One and you can immediately feel the difference. And if you have ever held a Motorola DROID 4 in your hand, you see why fans of the DROID line say that they are built like a tank. Even Samsung's own employees are said to be tired of the same old plastic and wanted to use metal on the Samsung Galaxy S4 although that would have required a delay in launching the device, which was not an option.
Samsung cannot allow its success to cloud its judgment. The company must listen to what its customers want and many of them want a metal uni-body construction on the next Samsung flagship phone. And don't expect any changes for the Samsung Galaxy Note 3. Rumors have already spread saying that the phablet will be made of the usual plastic.
source: KoreaHerald, SamMobile via GSMArena