As previously announced, the Ubuntu 18.10 release comes with the GNOME 3.30 desktop and Yaru — the new default theme that has been developed by the community. The new kernel and updated graphics libraries now support the Raspberry Pi 3 Model B/B+, the AMD Vega M-powered Kaby Lake G series, as well as the Qualcomm Snapdragon 845.
https://www.notebookcheck.net/Ubuntu-18-10-Cosmic-Cuttlefish-now-available-new-default-theme-and-performance-improvements-in-tow.339631.0.html