Windows 12 could see a substantial system redesign in order to include a more AI-centric user experience. The start button could thus be replaced with Copilot AI, which is already available as a preview version in the latest Windows 11 update.
I don't think this will happen. What they want is for PCs to be like phones, a closed system where you are pretty much locked into installing anything you want on your PC(and thus anything you buy as well) from their exclusive app store. The cloud thing just extra expense for no real benefit to them. However if there's an opportunity to push one drive you can be sure they will. And MS has been trying to move in this direction since windows 8.