As someone using a Chromebook as my daily driver, not getting into my workflow and quickly doing what I want is exactly ChromeOS's UI. Especially virtual desktops combined with the touchpad: Switching between tabs, going forwards and backwards in history, switching virtual desktops and apps is all done with a few gestures.

Hm, maybe that part is more polished, but I don't use it. My pain points are very basic stuff, quickly opening a file explorer, finding files, copy paste, navigating folders. It all improved, but still feels awkward and is way slower (takes more clicks/key presses) than in linux or windows.