For people who are more used to a few linux features which they very much miss in windows.
Multiple workspaces: You miss this feature when you are working on different projects and you see all the windows in the same workspace. You find it difficult to find the project specific window. You just wish there were workspaces where you could group together the windows and put them in different workspaces. Dont worry, you have a solution though not exactly similar to linux. Thank you Virtual Dimension.
Multiple Panels: For people used to multiple launch panels, ObjectDock.