Over the earlier alpha/beta releases, the Wayland 1.10 release candidate brings just some cosmetic fixes. Details outlined here.
Weston 1.10 Release Candidate 1 meanwhile includes various refinements and bug fixes. The Weston details are outlined here.
Overall, Wayland 1.10 is bringing the drag and drop actions API, frame events group allow grouping pointer events together for features like diagonal scrolling, a new buffer damage request to let applications communicate about areas of a surface that should be re-rendered, shared memory buffer changes, and other fun. Weston 1.10 focuses on Wayland protocol changes, a Video 4 Linux 2 (V4L2) client for demonstration purposes, the IVI (in-vehicle infotainment) shell has improved multi-screen functionality, touch input support now works, new Weston.ini configuration changes, and optional systemd notification support.
Wayland/Weston 1.10 is expected for release next Tuesday, 16 February.