Let's Get Physical
Smartphones improve year after year, and the Galaxy S III will be thinner than its predecessor while offering improved components. The Galaxy S III may be as slim as 0.28 inches (7 millimeters) thick [source: TheVerge]. The Galaxy S II measures 0.33 inches (8.49 millimeters) thick. Samsung's major phone releases leading up to the Galaxy S III trended toward large, high resolution displays, and the Galaxy S III will be no different. The Galaxy Nexus, released in November 2011, sports a 4.65 inch (11.8 centimeter) screen, while the Galaxy Note's screen measures an absolutely crazy 5.3 inches (13.5 centimeters).
The Galaxy S III's screen is expected to measure between 4.6 and 4.8 inches (11.7 and 12.2 centimeters) -- smaller than the Galaxy Note, but very close in size to the screen on the Nexus. Samsung knows that the Galaxy Note has a big, big screen. It's so big, they even shipped a stylus with the device.
Rumors also call for Samsung to use ceramics in the design of the Galaxy S III body [source: BGR]. Since many smartphones use a soft touch plastic backing or thin aluminum for casing, ceramic would be an unusual material. The ceramic rumor could turn out to refer to a color of plastic, however: Samsung's Galaxy Note is sold in "carbon blue" and "ceramic white."