Apple definitely does not have a monopoly.
Really? Where can I buy a Mac not manufactured by Apple and run OSX in a fully-supported install?
The fact that creative types are considering the Surface Studio (which has a Skylake processor and lacks any I/O faster than USB 3.0) tells you that much.
Creative types are considering the Surface Studio because it's new and targets them -- that makes sense. Professionals will look for ways to make themselves more efficient.
If anything, I think Apple has let their notebook line get too cluttered. They need to stop selling older models and eventually need to push the MacBook Air to retirement. To do that, they'd naturally need to drop the prices of the 12" MacBook and base 13" Pro. They may yet do that, but obviously 2016 is not the year.
I agree the lineup was getting a little cluttered. The main problem was the new 12" Macbook that was obviously outclassing the Air in design as a subcompact machine, but too expensive to be the "entry level" laptop. But there are two things missing here right now: a consumer level laptop -- something that is about basic functionality and not design, something approachable and affordable. There needs to be a laptop under $1000. Second, there needs to be a professional laptop that supports legacy technologies out of the box, without dongles. I know Apple may love the idea of everyone sitting on beanbags in an open-style office, sipping lattes and using wi-fi. But the real world is about wired LANs, USB flash drives, and other methods of transmitting data and "I forgot the dongle" isn't the sort of excuse companies will like.