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
Actually it's not Ubuntu, who make the Power Saving, it's the Linux Kernel 4.16 - in Ubuntu 18.04 there is only the Kernel 4.15.
No Kuros to Canonical, only to the Linux Kernel Developers.
Yeah, you are right. However, I am sure it is not the first time Canonical advertises a Kernel feature as a new thing of a new Ubuntu update. I don't think it's such a bad thing, but depends how you look at it.