Of perhaps more interest might be the new "low cost" iPhone 5c, which is similar to the iPhone 5, but has a plastic (although reinforced) case. For an iPhone, it's inexpensive, as low as $99 for a model with 16 GB of memory, which is probably fine for most people, unless you want to carry a lot of music, photos and video, $199 for 32 GB.
What's got the most attention from the press is the newly designed operating system, iOS 7. But that you can get even without buying a new phone. It will be available for iPhones back to it model 4, or iPod touch 5. Other than the graphical look changing, it seems like the most interesting new feature is a Control Center where you can access your most important apps (particularly system apps) from any screen with a swipe of your finger, from the bottom up.