Will Apple Computer's next version of OS X be able to run programs for Windows without Windows?
That agreement ran for five years, from August, 1997 to August 2002. Even though it has since expired, the rights it conferred at the time still lie with the respective companies. Whatever Microsoft grabbed from Apple they can still use, they just aren't able to grab anything developed since August 2002. Same for Apple using Microsoft technology like that in Office X. But Windows XP shipped October 25, 2001: 10 months before the agreement expired.
I'm told Apple has long had this running in the Cupertino lab -- Intel Macs running OS X while mixing Apple and XP applications. This is not a guess or a rumor, this something that has been demonstrated and observed by people who have since reported to me.
Think of the implications. A souped-up OS X kernel with native Windows API support and the prospect of mixing and matching Windows and Mac applications would be, for many users, the best of both worlds. There would be no copy of Windows XP to buy, no large overhead of emulation or compatibility middleware, no chance for Microsoft to accidentally screw things up, substantially better security, and no need to even take a chance on Windows Vista.