Ubuntu 15.10 launches in just a few days by canonical and bring with new features and improvements. like linux kernel 4.2, unity 7.3.2, compiz Window Manager that drives the unity desktop updated to version 0.9.12.2. Another important change in this release, Ubuntu 15.10 introduces stateless persistent network interface names, unity overlay scrollbars replaced with GNOME overlay scrollbars and most of the packages from the GNOME stack, updated to version 3.16.x.
For more information about ubuntu 15.10 you can read from Ubuntu 15.10 release notes