As you may know, Ubuntu is working a lot at Mir, their own display server specially created for Ubuntu Touch. They wanted to use Wayland and first, but in order to have more control over it, they preferred to create their own.
Yesterday, Kevin DuBois, one of the Canonical developers responsible with Mir has announced the availability of Mir 0.18, which brings initial support for the next-gen Vulkan 3D graphics and compute API. Also, it received support for plugin renderers, prepping the server for Internet of Things (IoT) devices, to avoid relying on CPU.
Last but not least, Mir 0.18 brings better multi-monitor support, the libinput library is now used by default replacing the old Android input stack and some bugs have been squashed.