Microsoft CEO Ballmer gives a speech using an Apple MacBook Pro laptop!

Someone recently captured a few precious photos during Microsoft CEO Steve Ballmer's speech. The notebook computer used for playing the presentation was not a PC, but rather MacBook Pro from their arch rival Apple. However, no one saw the operating system running on this laptop. Therefore, it could possibly be a dual system of Mac OS X and Vista, or it might have gotten rid of Mac OS X altogether. Below are the on-site photos.