We may just get that. Microsoft's attempt to introduce sandboxing with UWP/msix was ignored by developers. Since then MS has added Windows Sandbox to Win 10 Pro and up, essentially disposable VMs for running sketchy software. I wouldn't be surprised if a couple versions down the line we get the option for more permament app-specific VMs, with integration into the window manager similar to QubesOS. A lot of groundwork for that already exists for WSL2, like more efficient memory use between VMs and shared GPU access.