From the webpage:
The same libraries that secure iOS and OS X are available to third‑party developers to help them build advanced security features.
If you are requesting or implementing new features for a product, make cryptography a top priority.
Why?
The more strong legacy cryptography that is embedded into software if and when the feds decide on a position on cryptography the better.
Or put another way, the more secure your data, the harder for legislation to force you to make it less secure.
Word to the wise?
I first saw this in a tweet by Matthew J. Weaver.