The reason MS hasn't come out and said more is because this is Sinofsky's MS now. And he won't allow anything specific said about a product until it's damn near done, or at the very least feature complete. That means, unlike with the Longhorn/Vista mess, when they announce something about a product, it WILL be in it or have that feature. So if they're not saying anything, it means IMO they aren't 100% sure what the final feature list is. And it's that simple.