Linking to: Christian Reber on Twitter
Keep the team and focus on MicrosoftToDo, and no one will be angry for not shutting down Wunderlist.
Acquisitions like this are never about the app itself. When Microsoft wanted to get started in the mobile space, they needed people who knew how to build mobile apps. Both Sunrise and Wunderlist were beautiful apps made by extremely talented people.
While I don’t expect this to work out, I think it would be awesome if it did.