You mean Linux and Linus Torvalds? It already happened. Smartphones became the next hot item years ago. There are over 7 billion smartphones in the world, about half of which run Android which is based on Linux. There are just over 2 billion PCs in use today. In addition, most other devices with embedded operating systems, everything from thermostats, security cameras, internet routers and smart A/V equipment to the huge internet server farms run by Amazon and Google are based on Linux. iPhones are based on BSD which is a close cousin of Linux. Both are rewrites of Unix, which preceded almost every other operating system in use today. Even Windows 10 and 11 contain a Linux subsystem and Windows 11 will soon have an Android subsystem.
The only question is, will PC hardware and Windows evolve enough to still be in demand ten years from now? MS could easily become the next IBM, a company that has lost most of its core business and is focused mainly on retaining business customers. The main reason PCs are hanging on is due to business, school and gaming PC use. Current supply chain issues combined with demand for work and schooling from home have depleted stocks of affordable PC hardware that runs Windows. Windows 11 could become the next Windows Vista, an operating system that nobody wants, hardware requirements that are too expensive and billions of PCs in existence that cannot run it. The difference this time around is that there are other companies who are big enough and capable of providing viable alternatives.