Well, it's not a single event thing, but a series of events. Upgrading IExplorer to something that can be called a modern browser and helping to estinguish IEx

Well, it's not a single event thing, but a series of events. Upgrading IExplorer to something that can be called a modern browser and helping to estinguish IExplorer 6 is another event. Replacing Balmer was another event. Partnering with Xamarin (instead of crushing them with patents) was another event. Releasing Office Mobile for Android and iOS was another event. Etc... As to why they are doing this, I don't really care as long as they are aligned with my needs. Plus I'm allowed to change my mind, depending on my mood :-)