I haven't tried the fingerprint sensor and I doubt I ever will. The screen did take some getting used to and I still have an entire row of nothing. I could put something there like Google Maps, but I don't use it enough to justify moving it our of my Utilities folder. The only app I can see downloading the future is Mii Verse. I suppose I could get apps for my bank and credit card, but I usually do that stuff at home anyway. Otherwise, I have my browser, email, and youtube.
The 5S is really quick which is nice and it's noticeably lighter than the 4S. That caught me by surprise because I never really played around with the 5 so I had no idea how much weight Apple shaved off.