Ubuntu 16.04 LTS (Xenial Xerus) Final Beta OS a couple of days back along with the Beta 2 builds of the opt-in flavours. This was for the first Beta build of Ubuntu 16.04 LTS (Xenial Xerus) which was released publicly, although this may be the last too as Canonical has called it the ‘Final Beta’.
About Ubuntu
Ubuntu 16.04 LTS (Xenial Xerus) Final Beta is based on the latest and more stable Linux kernel 4.4.6 and it does allow the users to relocate the Unity Launcher to the bottom of the screen through a code. It also includes the GNOME Software as the default package manager, GNOME Calendar and the LibreOffice 5.1.1.Users who would adopt the Ubuntu 16.04 LTS Beta right now won’t need to reinstall he OS when the final Ubuntu 16.04 LTS will come out. They would just need to keep up with the updates