It's common sense that Nokia was not going to have a use for Qt or anyone involved with it once they moved to a MS strategy. I would honestly love to know what is being communicated internally for Nokia employees to be surprised at this.
Not because everyone will make the transition but because what separates a great QT/.net/java/c++ developer from an average one has vary little to do with experience. So, while such transitions are a great time to remove deadwood, and you want to find some experts in the new stack laying off the old team is expensive and rarely worth it.
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...
The two biggest strategic blunders you can commit: One, staging a ground invasion of Russia in winter. Two, partnering with Microsoft.