They are different, but both are true here, and they are related. It's not truly open because it is not standardized, nor even proposed to be standardized, and

They are different, but both are true here, and they are related. It's not truly open because it is not standardized, nor even proposed to be standardized, and it relies on other non-standard technologies (Pepper). Also, it is incompatible with the open web because it is not hardware-independent, which is another type of openness it lacks.