With the end of Unity -- a project that sought to create a unified control across desktops, tablets and phones -- Ubuntu's developer, Canonical, has created a customized version of GNOME, the venerable graphical user interface (GUI) for Linux desktops.
Here's a nice video that shows off the features of Ubuntu 17.10 (Artful Aardvark), with GNOME in place of Unity. For old Unity users, you'll see many (but not all) of the old functionality. For new users, you'll see a clean, modern desktop. In our opinion, this desktop makes a lot more sense than Windows 10.