I'm really confused by google now, they were already working on FuchsiaOS which they promised to be optimized for Phones, Tablets and Desktops. But I'd also love to see them be replaced with ChromeOS.
If they ever care about it again, I'd love to see them have
-Optimized Apps for both touch and mouse
-less bloat (Would help their transition to it)
-Seperate UIs for Desktop Use, and Touch