A hardcover purchase (either from me or IPR) comes with a free PDF.
The only 'exclusive' content is the soon-to-be-release Prismaxia supplement. That was a free stretch goal for Kickstarter backers, but will be sold separately for anyone else once available.
All of the other material was added to the core book, so it's included when you buy the base game.
Let me know if you have any questions!