Im still using an iPhone 4S because quite frankly I was unenthused by the iPhone 5 when it was first released. It seemed to be a fairly dilute product, and I saw no particular need to upgrade.
Now, if they consolidate the design and review the specs a little, Ill be quite willing to jump ship, mainly because my trusty 4S is really starting to show its age and because theres a plentiful number of apps out there that take advantage of the 5s enlarged screen format.
Still, it seems to me that from the 5 onwards Apple has lost its way a little, erring on the side of conservative caution. Which is quite understandable, but a little sad, too.
Im still hoping that the front bezel of this thing might reveal something interesting, unexpected and useful such as a fingerprint sensor and NFC communications to argument credit cards at POS, but I think the chances are slim.