MS is in major trouble and a new OS isn’t going to make it better.
Rumors say there is going to be a shakeup at 2014 CES by companies tired of cleaning up MS messes.
A lot of MS popularity is image and legacy inertia.
If Linux could step up tomorrow and offer businesses the ability to painlessly jack up their front ends and change out the MS engines for Linux... a lot would probably do it.
you have to wonder how much money companies worldwide have spent getting microsoft stuff to work properly the last 25 years. trillions, probably.