You could say the same thing about Computers when they were mostly mainframe. I am sure someone will figure out how to make it commoditized just like personal computers and internet.
And notably, those phones and tablets are intentionally hobbled by the device owners (Apple, Google) who do everything they can to ensure they can't be treated like personal computing devices. Short of regulatory intervention, I don't see this trend changing anytime soon. We're going full on in the direction of more locked down now that Google is tightening the screws on Android.