I admit the iphone innovation as been a little stale over the last 2 years or so.
Innovation:
1. something newly introduced, such as a new method or device
2. the act of innovating
The Fingerprint sensor implementation in the iPhone 5S is indeed innovation so it's not fair to say the iphone innovation is not there.
I think what you are trying to communicate is more in the lines of "Apple hasn't done anything new and exciting with the iPhone lately".