I'm not judging which platform is best. If ARM has reached the status of standard is the by the same reason x86 has reached the same status. Each one in its own area.

But the fact is that the way is open for a platform to finally compete where the other has been alone for years.

And

This system allows builders to create devices only by adding features to the core. If the hardware needed to have that features is driven by open source code, or at least by free code, developers and hackers could make that systems do what they want, and install, adapt or port whatever open source software they want.