Certainly starting new stuff is important, but I think it's worth pointing out that focusing your efforts is one of the hardest things to do. One could argue that it was more important for Microsoft to become competitive in things like Azure, than it was to start new things. It's kind of like how successfully retreating is, militarily, more difficult than successfully attacking, because you're already in a bad situation.

But, pretty soon, it will be time for Microsoft to prove they can start new stuff again, you're correct on that.