I do expect that China adopting Linux as the main OS will propel Linux to leapfrog Windows and macOS going forward. It's not going to be just 1.4 billion people in China using Linux, but also all the countries that will be buying Chinese hardware. This will likely result in Linux becoming the dominant OS globally.
Also the decision of Microsoft of discontinuing windows on hardware produced before 2018 is an incentive to transition to Linux in developing countries (although I saw massive use of windows 7 even today...)