You really, really should read Adam Bullied's recent post about the fundamentals of product management. I also give a big thumbs up to the idea of incorporating product management into undergrad and grad school curricula.
A question I've been hearing with increasing frequency is, "Should there be a professional certification for product managers?" Tyner Blain has a thoughtful post on just this subject that's worth reading.
There are three obstacles to making professional certification worthwhile:
First, you have to agree on what product management is.
Then, you have to define the curriculum that every product manager needs to master before getting the blessing of some certifying authority.
Finally, you need to trust the certifying authority.