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I've heard it was partly to take advantage of the DRM in Intel's chips. At least, that's what Engadget was saying.


No comments about DRM were made at the keynote, so it's likely just speculation. Though I guess they could use such hardware locks to keep OS X on Apple machines. I just don't see them going much beyond that though, unless it becomes a necessary evil to a future iMovie store. Apple added DRM to iTunes only to appease the RIAA to open the store. Users have no ability to add DRM to their own tracks, like you can on Windows Media.