While some people perceive MACs to be better looking (personally I really think the white plastic and glossiness really ugly, the aluminum is not much better), the aesthetics of the MAC is not why they are used in films/TV. There are plenty of good looking PCs, an they could easily and cheaply have a designer made laptop for a film. No, the real reason MACs are used is because of the image of Apple, it fits with the whole Starbucks experience.