Wayland 1.5 features a new internal event queue for Wayland display events, which allows for the client library to dispatch delete and error events immediately. On the build front, Wayland now uses non-recursive Makefiles.
As usual, the Weston compositor changes tend to be more interesting these days and includes more work on XDG-Shell, the Weston input stack is now split out into libinput, there's support for the new XWayland Server to be found in this summer's release of X.Org Server 1.16, the full-screen shell was added, an animate window closing event, support for different color depths on different outputs, and other changes.
Wayland/Weston 1.5 is overall in great shape and from yesterday you can see some fresh development stats, with Weston now being more than 90,000 lines of code.
More details on Wayland/Weston 1.5 can be found via the official release announcement by Kristian Høgsberg. He's also shared some early Wayland 1.6 details, which will be saved for its own Phoronix article shortly. (Update: Wayland 1.6 details have been posted.)