WHY, oh why are we still calling this the iPhone 5, when it's going to be the 6th generation iPhone. Think about it, the only reason the iPhone 4 is called that is because it was actually the 4th generation! This is in fact, the iPhone 6!!
After 5 years... Apple's naming scheme has been all over the place:
iPhone.......... plain 'n simple
iPhone 3G...... network
iPhone 3GS.... network + speed
iPhone 4........ generation
iPhone 4S...... generation + Siri, Steve, Speed, Samsonite
Who knows where they will go next...