If someone had told me over ten years ago that one day I would be using a phone with an OS based on a Linux kernel, I'd have told the person they were insane. Today, Android is the most popular mobile OS on non-Apple phones. Something like this seemed impossible to many people at that time, but Google has proved that nothing is impossible in this respect, and they have won the game.
Despite the fact that Microsoft Windows has been ruling for decades in the PC market, there is still a niche for a good desktop OS, there’s no doubt about it. The fact is that, on the one hand, the quality of Windows is getting worse and worse with every update, and it has now become a bloatware monster, cluttered with tons of useless functions and numerous inconsistencies. On the other hand, the hardware quality and price policy offered by Apple put off many users and companies, which are now more than ever before willing to reduce their costs. Many of them simply go back to Windows only because the software they use at work runs on Windows, and not because Windows is a fantastic operating system.
In this situation Linux seems to be the only alternative to Windows. It's far better than Windows in many ways, for example, it's more stable, secure, flexible and customizable. However, the major problem with Linux is not the plethora of different distros, but the lack of high quality proprietary software for professionals (photographers, graphic designers, film makers, etc.). Linux with commercial proprietary software for professionals could probably quite easily fill this void in the market, and, as a result, gain more popularity.
Some of you probably know that Intel has been working on its own Linux distribution for some time (Debian based), the project is called Clear Linux. They've already imported 4000 apps into their app repository, and they're going to double this number in the next two years. The aim of the project is to make their own Linux distro that will be fully compatible with all Intel processors (both CPUs and GPUs). This will allow them to control the hardware and software, just like Apple does. Who knows, maybe in a couple of years Intel will become a hardware-software company (they have both financial and human resources to do that). By the way, Nvidia are also thinking about something similar in their future business model. Moreover, Google has been working for a few years on their new operating system called Fuchsia, which will probably be both mobile and desktop OS (with a Linux kernel, just like Android). Look what you can do today with Samsung Dex, such solutions can be in fact the core of next-gen operating systems.
Some people from Serif say here that making their software for yet another platform is very hard, both from technical and financial point of view. It's true of course, software development requires a lot of resources, but you should remember that it's not impossible, and it may pay off the company in the long run. Saying that doing something doesn't suit the business model of the company is also quite risky - keep in mind that the market is very dynamic, trends are changing with time, something that today seems pointless tomorrow may turn out to be very profitable. Serif could pave the way for Linux to become a serious alternative for many creatives in the future. I guess it's worthwhile now to keep a close eye on Linux, and never say 'never'.