As you probably already know, the biggest change in the upcoming GNOME 40 desktop series, due for release in late March 2021 (that’s only a month and a half from the moment of writing), is the redesigned Activities Overview, the screen you see when clicking on the Activities icon on the panel in the left top corner. In GNOME 3.38 and earlier versions, the Activities Overview had a vertical layout, but in GNOME 40 is has a horizontal layout, which actually makes navigation between workspaces and the app management more intuitive. The horizontal layout also places the dock at the bottom of the screen, and workspaces are now displayed horizontally as previews on the top of the window picker, right under the search field, and navigated horizontally even using the mouse wheel.