Yeah, should have gone there before I commented! But you hit on my big worry is that Qualcomm is a very closed company and using the board would be quite problematic in a commercial setting without full access to the docs.
Libraries often turn out to be either incomplete or designed for a very narrow use case(s).
It will be interesting to see how this works.
If you go to their web site, your will see that this is a commercial board.
They also have a Qseven expansion slot variant of the same processor for inclusion as a processor base into a custom design. I doubt the full chip docs will be available, more likely, access and customization will be through libraries.