The official Ubuntu 17.04 flavors are available for download. Here’s a quick look at what’s new in the latest 17.04 beta release of Ubuntu Budgie, Xubuntu, Ubuntu GNOME, and Kubuntu.
All the Ubuntu 17.04 Zesty Zapus beta 1 flavors include Xorg server 1.18.4, Mesa 13.0.4 (17.0.0 is available in the proposed repositories) and the 4.10.0-8.10 Ubuntu Linux kernel, based on the upstream 4.10-rc8 Linux kernel.