(Thanks to BoingBoing for this one.)
OK, bear with me as I try to explain this.
Back in... I guess it would be 1983, just as Apple is getting ready to take on the PC, they created an awesome, iconic advert that heavily referenced George Orwell's classic novel 1984. Now that Half Life 2 is getting a release on the Mac, the creative minds over at Valve have put together a very clever parody-of-a-parody of this original advert, and of 1984 in general.
They're both worth watching.
Apples 1983 advert