I'm not really sure what that would look like, though. Aside from perpetual behind-the-scenes work supporting new hardware and providing security updates, the OS seems like a substantially solved problem.
Maybe I just lack the creative vision, but I don't see the next "whoa, you can tile windows now", or "whoa, a start menu", or "whoa, tabbed browsing". I don't even remember the last "whoa" enhancement that made the product meaningfully more functional as an operating system. Not on Windows--and not on Linux or MacOS either.