As apple goes more and more main stream, they are getting more cautious with their roll out. The enhancements are incremental, especially in software.
Once in a while, apple still have some surprises in the hardware, but gone are the days where i get terribly excited by what they have announced.
Microsoft on the other hand is taking all the risks. From a major departure of UI with Metro UI to the well executed (based on what i have read) new office. Even the UI for the new office has that apple simplistic feel to it. It is like back to basic. With technologies like Kinect, Surface, the table as well as the tablet, and Office 365, they are coming out with more exciting products than apple.