Fedora Workstation has a new product requirements document. This is mostly useful for Fedora teams and contributors who have high level questions about Fedora Workstation, like: what are its goals, who is its target audience, what are the main features, and so on.
Each of the other Fedora editions have recently updated their PRDs, and I think that this completes the set.
The Workstation Working Group hopes that the new PRD is useful!