Yes, or how the software manufacturers like it. There is no guarantee.
That's absolutely true. It's up to the developers to decide whether Apple is a market worth pursuing.
Here's how I'm seeing it:
iOS/iPadOS already dwarfs Mac. There are far more iOS/iPadOS apps than Mac apps. So, in the not too distant future, one of the key selling points for a new Mac is, "You can run all your favorite iPad and iPhone apps on your laptop/desktop." I think that's compelling for a much larger market share than, "You can run your Windows apps in Bootcamp."
Consider how many large corporations are already running iOS/iPadOS with Mobile Device Management. Imagine if the ease of administering that platform (and the pre-existing investment in that platform) can encompass all the office laptops as well. Goodbye to the expense of dual-platform support.
What about independent developers? By choosing to write for the
Apple ARM platform, a developer can sell their apps for iPad and iPhone as well as Mac. That's a far, far larger market than writing for Mac alone.
For example, a maker of CAD/CAM software can produce, with virtually no additional effort, a version that runs on tablet for the factory floor as well as on monster desktops (and I'm sure they've already had MacPro-quality processors in development for quite some time).
What I see is the potential over the next 5-10 years of Apple moving its desktop market share from 10% to 20% or more. The bigger the share, the more attractive it is to developers of niche/industrial applications. It becomes a "virtuous circle" where greater app availability drives larger platform market share, and greater platform market share drives greater app availability.