Sorry to burst your bubble, but the entertainment industry isn't driven by Apple computers. Hell, even Pixar hardly uses Apple hardware. While it was probably common to see Apple's presence in a lot of these shops back in the day, that is simply not the case now.
Um, where have you been in the entertainment industry? Because all I see in the medium-end (indie TV/Film and high end music facilities in Los Angeles, Nashville, and Austin) are Mac Pros. And occasionally G5's, to be honest. There are virtually no PC's in the actual creative content world, at least here in LA. Europe, now that's another thing.
If you are talking about enterprise-level stuff (ie, Weta, ILM, Pixar, etc.), then they do use PC's for the render farms. But walk into virtually ANY editing bay, and literally ANY music or post studio, and you will see Macs.
To be honest, that "high end" (really stratospheric, and irrelevant to the discussion of single-user pro computers) is not where you'd expect to see Mac Pros - they are workstations, plain and simple. In other words, what the super-uber-more-money-than-god-"pros" use is irrelevant to the discussion of what working creatives use. And they, at least in my experience, use Macs*. Period.
(...And most of the video editors I know who actually work still use FCP7 or MC5. I see more PTHD 8 than 9 or 10, and have only seen a few HDX cards in the wild. Now, the ones who don't have work generally have the newest stuff...)
