I respectfully disagree. Everything can be reinvented. In fact, I'd argue that this is precisely Apple's forté. If you really think it's all there right now, I'm happy to predict that you will be pleasantly surprised come iOS 7.
Personally, I believe iOS 7 will bring not only a revamp (though I wouldn't go so far as to call it "total") but also existing features reinvented and one or more brand new feature(s) that we haven't seen yet, at least in the mainstream.
I'm clearly being optimistic and perhaps naïvely so but since I can't say "for sure" what the future will bring, I'll just sit here happily hoping for it all.
(By the way, I can think of many practical situations where it could be good to not set expectations too high...but this is just a cell phone and as long as they don't butcher the OS, I won't cry if I don't get everything I'm hoping for.)
Stupid? Can you elaborate, please?
Also, iOS 4 > iOS 5 was pretty significant, by Apple standards. iOS 5 > iOS 6 was, in my opinion, far less so.