Why is it so hard for people to understand that the iPhone 4S IS iPhone 5! The next iPhone will be the 6th one, if that's what they mean. There's zero chance the next one will be called iPhone 5.
It's annoying to see this everyday, and it speaks a lot about the state of the tech blogosphere, where most are just quick to copy each other rather than think for themselves. It's not even a hard concept to grasp.
It's even easier than the one where they also erroneously called the next iPhone after 3GS, the iPhone 4G, when AT&T didn't even announce a LTE network or even a faux "4G" one, and Apple never named their iPhones "2nd or 3rd gen". iPhone 2G and 3G were named that way because of their 2G and 3G connectivity.