"Open sourcing the NT kernel does make a lot of sense though, since it would be easier to integrate Windows in Xen, KVM, and other virtualization infrastructure."
If you're interested in an open-source NT kernel, you might be interested in ReactOS. Although their target comprises development of the entire OS, their main task was the NT kernel and "the glue" with existing parts of Win32 sub-system developed by Wine.
If you're interested in an open-source NT kernel, you might be interested in ReactOS. Although their target comprises development of the entire OS, their main task was the NT kernel and "the glue" with existing parts of Win32 sub-system developed by Wine.