That misses the point. You seem like some that likes to color outside the lines.
Nope, that doesn't miss the point at all. The desktop computer market and/or laptop market consists of many vendors and Apple is just one of them. Apple has their business model (as mentioned already) and others have theirs.
So, a consumer can pick whatever company they like and/or want -- from the wider market for computers (and the consumers that want those machines) or according to a "business model" that a consumer prefers (but it doesn't appear that consumer care about the type of "business model" but rather, is happy with something that works and works very well).
And so, the fact of the matter is that Apple's business model is gaining consumers and expanding their market share and they show no signs of slowing down from the last decade of their expansion.
Why would Apple want to change a good thing?
In many cases, their business expansion, (into the business market that is,) is based on being able to load windows on their hardware platform, and because they produce an excellent product. But we are still stuck with windows, very frustrating.
As hardware developers, I am not sure how they would be hurt by expanding the use of their operating system across platforms. They could always keep the general PC version one or more versions back, just an idea.
And yes, I know that is not thier business model.