It's reality because Mozilla makes it a reality. See how this is a circular argument?
Meanwhile, native mobile and desktop keep growing, and growing, and the web as an application platform loses out, because none of the native platform vendors are quibbling about whether they can convince themselves to ever do something different than what they were doing before.
Meanwhile, native mobile and desktop keep growing, and growing, and the web as an application platform loses out, because none of the native platform vendors are quibbling about whether they can convince themselves to ever do something different than what they were doing before.