I am not so sure they would announce a new one. They are in a great position right now; Kinect is selling like gangbusters and they are topping the charts on console hardware sales. Their first party and third party games usually are above their competitors, and things just seem to be going well finally after five years.
Exactly. Also the article doesn't contain any clues about a new Xbox. Probably that is why the original title is "Microsoft to Unveil New Xbox Announcements..."