The project is called “Lacros” which Google says stands for “Linux And ChRome OS.” This will split ChromeOS’s Linux OS from the Chrome browser, allowing Google to update each one independently.
Previously ChromeOS was using a homemade graphics stack called “Freon,” but now with Wayland, it’ll be on the new and normal desktop Linux graphic stack. Google’s 2016 move to Freon was at a time when it could have moved from X11 (the old, normal desktop Linux graphics stock) directly to Wayland, but it decided to take this custom detour instead. Google says this represents “more Wayland support” because Wayland was previously used for Android and Linux apps, but now it’ll be used for the native Chrome OS graphics, too.
Microsoft also implemented the Wayland specification and it did zilch for adoption or growth of wayland. Let me put it another way, Chromebooks also adopted upstart and that has not had an impact on upstart use or adoption in the broader linux ecosystem.
Its more likely they’re gonna use work done for desktop linux with minimal if any contribution backwards to things we care about.