Personally, I would like to see MS do the inverse of what they did with Linux - move to Linux as their primary kernel and embed the NT kernel with hooks into Linux, either via hypervisor or directly if hypervisor doesn't give it the performance it needs for us to depart from NT kernel permanently. Not saying NT is bad... just that Linux has so much more momentum on the server, is well liked, popular and 'free'. Make NT an afterthought in Linux... not the other way around.