It's all about mobile now with MS, hence all the annoying commercials (or so I am told). They are trying to do what Linux can do with the Ubuntu phone.
For Desktop's just put Vista 64 or W7 64 on it and call it a day. For Linux user's who want a fully integrated mobile / pc experience, Ubuntu is the way to go.
Ubuntu for phones - Industry proposition - YouTube
Ubuntu for Android | Ubuntu for phones | Ubuntu