Proof by counter example: I've been to NARA II at College Park dozens of times, researching and writing various papers or games I have worked on as side projects. So for example I did a lot of research on WW2 era naval damage control for a video game I was working on that never actually got out of the prototype stage.

Depending on exactly how this is enforced it could be nothing or could be a big deal. It depends entirely on how much you trust the people who will be setting and enforcing the policies, and right now there have been a lot of withdrawals and very few deposits into the organizational trust of the US Government supply.