The next generation iPhone will be iPhone 5 or The new iPhone?

As for the name of next generation iPhone, many people believe that Apple will name it as what The new iPad called. However, most people think next generation iPhone will be named iPhone 5, iPhone 4 leather case. Then, if there is rule for Apple to name their products? Let's take a look at this below diagram:

In fact, Apple does not have any product called iPhone 1, iPhone 2 or iPhone 3, only iPhone 4 is the one named with digital. Louie Mantia, famous iOS icon designer said the next generation iPhone can not be called iPhone 5, iPhone cases , because iPhone 4S is actually the 5th generation iPhone. Naming next generation iPhone as iPhone 5 does not make any sense.

Will Apple call next generation iPhone "The new iPhone", iPhone accessories ? We only get to know it till Apple officially release next generation iPhone. But the picture above and the name of New iPad may give us a little inspiration.