I think Apple likes that their computers are used to make the content that people use their computers to consume. I think it will take them a while to give that up. I also think that, eventually, they WILL give that up -- it just won't be for a while yet -- and that's probably about when I'll stop using Apple products.
I don't know if that's true. There are a lot of professionals in the visual arts who need monstrous, component-driven, customizable workhorse computers to do what they do, and that won't change any time soon because their job depends on working on or near the cutting edge of what hardware can output.
Apple has served that market (or at least the front-end focused part of it) pretty well in graphic design and video for a long time, but even if that market becomes too small or too complicated for Apple, those people will still need their machines and their systems, and their business will be big enough for someone.