Scheduled to arrive in October, Ubuntu 18.10 "Cosmic Cuttlefish" will still use GNOME but will come with a new default theme called Communitheme, improved power saving options, a faster first-time startup for apps installed as snaps, DLNA media sharing, and more. Until then, version 18.04.1 is expected to drop in July with a few minor changes, as well as the usual tweaks and bug fixes.
https://www.notebookcheck.net/Ubuntu-18-10-will-come-with-a-new-default-theme-improved-power-management-and-more.304250.0.html