Probably, but I heard iPhone 5 was Steve Jobs "Legacy Device" he worked on before he died and the iPhone 5 slogan is THE BIGGEST THING TO HAPPEN TO IPHONE SINCE IPHONE. If that's true what could be the slogan for iPhone 5S or 6? The skinniest thing to happen to iPhone since iPhone? No...
Only Apple know the answer to that. The press and everyone assumed the iPhone 4S would be called the iPhone 5 instead.
Unless something huge changes in the phone market outside of screen size, resolution and maybe some fad which catches on I can see the 5S being real next year.
Easy, THE NEW BIGGEST THING TO HAPPEN TO IPHONE BEFORE THE PREVIOUS IPHONE Introducing the "new" iPhone. That was easy, next question.