This only further indicates that the market has caught up. It is no longer the iPhone and everyone else. Samsung has clearly differentiated itself from other hardware manufacturers and is on par with Apple. As a result, an incremental upgrade in the form of the iPhone 5S may not be enough to calm fears that Samsung is not going away.

http://www.cnn.com/2013/05/20/tech/mobile/galaxy-s4-top-smartphone/index.html