Apparently Microsoft's new operating system, codenamed "Longhorn", is taking a few pages from Apple's OSX.
Microsoft's demonstrations were interesting and somehow familiar. After looking at some images and icons that grew bigger or flipped when chosen, I couldn't help but think of the dock on Apple's OS X.
The good news for Apple is that Longhorn is still probably 2 years away from being released, so they have lots of time to implement something new. :)