Cell Phone OS and Desktop OS are way too different animals.
On the Smart Phone world the Arm processor is king, the Desktop and sad to say, is Intel.
MS is more tweaked to Intel or lets say x86 Architecture.
There are a lot of issues converting the Win7 from Intel to Arm so it can be usable.
On that arena, Android and Apple blew MS systems off the water.
And as I said the before, the Android Interface will be the one that will break the Linux phobia.
Users does not give a rat's ass if you are running Linux or not, but they do care on what the Interface looks.
I am wondering, why there is not a GNOME or KDE phone interface yet?
Perhaps the Tablet market since is a new gadget will break the learning phobia.
I can say MS will not be as dominant as it was before.