Nokia will surely be a good fit for Microsoft as they have been playing behind the scene for years and perhaps this would be the best way for them to get in front of the game. And owning Nokia will allow Microsoft to embed Windows OS on all their future devices instead of begging the other device manufacturers to embed them.
While its a great fit for Microsoft, i m not too sure whether the deal will pan out positively at the end as its going to take a lot of pursuasion to Nokia shareholders to give up their crown jewel mobile business. Even if the shareholders were to agree, its going to be fascinating to see whether other bodies like the US government, Finnish government, and the internal staff of Nokia will give the support and approval.
Good luck to Microsoft and Nokia and as for us, lets enjoy the show.