Google looks to be positioning its Fuchsia OS as a replacement for Android and Chrome OS on its Pixel hardware. Although the roadmap for the operating system has not been formally signed off, Google has over 100 software engineers working on the project.
https://www.notebookcheck.net/Odds-firming-that-Fuchsia-OS-will-replace-Android-Chrome-OS-on-Google-hardware.317428.0.html