Developed by a few developers, reportedly with Intel engineers, is a sliding layout effect for Weston. There are shortcuts on it above the background like launchers on the panel that can then be activated by a single click. These shortcuts can then be dragged to the trash for removing them. The layout/shortcuts can also be configured using the weston.ini configuration file.
In the brief mailing list announcement, a short demo video was included. I've uploaded this video to YouTube for the reader's convenience.
This is just one of many features being actively worked on within the Wayland camp at the moment.