We have no idea what is in the pipeline at Apple, nor what their "vision" is. Steve Jobs and Apple never came out and announced that the iPhone was in development and that it would revolutionize the tech industry - it just did in 2007.
Let's wait a few years before we decide if Tim Cook is just riding the wave of prior success.
Your thoughts may prove to come true, but R&D is a multi-year undertaking, not something you scramble on at the last hour. The iPad was in development since 2002! Jobs has only been gone for a year. His influence should remain for at least the next five years, and only after that point can we really say if Apple is out of ideas or not.
Let's wait a few years before we decide if Tim Cook is just riding the wave of prior success.