Hmmm... Photoshop on Mac and PC. Both are so similar that you can switch from one platform to another and not break a sweat.
Flash... same thing.
Adobe Premiere... same thing.
There's nothing a Mac can do that a PC cannot and do it cheaper to boot.
The biggest thing Mac has going for it is ease of use when adding devices. Of course... the reason it's easy isn't because they are particularly brilliant at Apple. It's because they have no variables, no options, no choice.
Take a look at the thousands (if not millions) of different ways to configure a PC. Different motherboards, different RAM, different soundcards, video, you name it. The fact that Windows runs on most of them is an amazing thing.