Details wont be released till July 1 or later, so all we have right now to judge is this claimed goal:
"Establish a federally chartered, fully independent, not-for-profit corporation to operate and modernize the ATC system, free from the volatile funding uncertainty, political meddling, and bureaucratic inertia that have plagued FAA and our ATC system in years past."
To get an idea of the kind of entity proposed, the following are examples of some existing federally chartered, fully independent, not-for-profit corporations:
Boy Scouts of America
Girl Scouts of America
American Legion
American Red Cross
Little League Baseball
4H Club
These are examples that are federally chartered but don't make the cut because they get some or all their funding from the federal government:
National Academy of Sciences
Federal Reserve Bank
FDIC