I think that the main 'dissapointment', to use the same word, is that people may well have been expecting some more exotic additions, thats all.
I say its a let down in a sense that the iPhone 5 rumour mill has been churning for a while now, with 'leaks' of new tech that was allegedly to be introduced, near field technology being one. I cant help but but wonder whether Apple have plumped for form over function, but when they do release the 5, it may well have a new chassis, much like the move from 3 to 4. If you want a powerful and versatile smart phone, the Android handsets, speaking as an former iPhone fan, are better.
Now, I am sure that we can all appreciate that these supposed leaks are all rumour and speculation, but it does build up the hype. It should be more impressive when Apple do release the iPhone 5 though, I really hope they finally put a bigger screen on it!!