This release features GNOME 3.38, which has plenty of great improvements as usual. The addition of the Tour application helps new users learn their way around. And like all of our other desktop-oriented variants, Fedora Workstation now uses BTRFS as the default filesystem. This advanced filesystem lays the foundation for bringing a lot of great enhancements in upcoming releases. For your visual enjoyment, Fedora 33 Workstation now features an animated background (based on time of day) by default.

https://fedoramagazine.org/announcing-fedora-33/ https://docs.fedoraproject.org/en-US/fedora/f33/release-notes/