I'm thinking Jony Ive spent way too much time on iOS 7 and not enough on the iPhones. The 5S in particular looks like a project that was thrown together at the very last minute. It's not as bad as the "look it now comes in white" crap they pulled a few years ago, but close.

As far as the 64-bit processor, I can't help but think it will be a long time before developers take advantage of it. I've been running 64-bit computers (PC and Mac) for at least 5 years and some of my apps are just now being released in 64-bit versions and many are still in 32-bit versions only.

The fingerprint thing is old school. My Motorola Atrix 4G had it 3 years ago. It seldom worked though, so perhaps Apple has done better at implementing it.