Nokia will become --at best-- a insignificant MS home making division, and at worst an ex-partner with no recourse.
The two biggest strategic blunders you can commit: One, staging a ground invasion of Russia in winter. Two, partnering with Microsoft.
The radical perspective is that they have a "MS strategy" and that that "MS strategy" will do them any good.
You seem to believe something which, judging by Nokia's results and MS recent (10 year) history, it seems ludicrous if not suicidal.
Plus, if that "Surface" thing goes well, what's to stop MS trying to build their own phones? From a mobile leader that it was in the past, Nokia will become --at best-- a insignificant MS home making division, and at worst an ex-partner with no recourse.
Of course the more probable outcome is that Windows Phone 8,9,10,x will continue it's Zune-like irrelevance, and Nokia with enter a RIM like free fall...