[unimpressive]

>With very few exceptions, phones and video game consoles have always been "walled gardens".

True. The problem comes when people try to use them as general computing devices. Or even, when manufacturers treat general computing devices like phones and consoles.

[cico71]

I'm not sure what you mean here. Consoles and smartphones are general computing devices and are clearly marketed as such. Consoles are not only used for games/audio/video and smartphones are definitely not used for phone calls.