In short, this change proposal seeks to get rid of Fedora Flatpaks for Atomic desktops. Fedora Flatpaks will still be used for the preinstalled apps, but all (or most?) other Fedora Flatpaks would be hidden by default.

Note this proposal does not enable Flathub, that’s a separate Change proposal (currently not up for FESCO voting): https://discussion.fedoraproject.org/t/proposal-enable-flathub-by-default/157011