At this moment I don't think that project is far enough ahead, as it currently only works on one model of Mi4 and even on that one I read not all options were working.
Microsoft however, made news recently, having a program that will allow users to modify the ROM, so we may sooner, rather than later be able to push WM on Android.
I know some guy actually used that to push a full windows 10 on a phone, albeit with many flaws and issues, like the touch not working at all.
EDIT: As libra89 pointed out, not really worth trying it at all at this moment.