Cross Operating system for mobiles and desktop Like flutter

Is it possible to create a cross-platform operating system that can be used on both mobile devices and desktop computers, similar to how Flutter allows for the creation of apps for Android, iOS, websites, and desktop applications using a single codebase? Considering the number of job opportunities that have arisen for Flutter developers after its release, can we expect the creation of such a cross-operating system to generate similar job opportunities and service providers?

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