Even meeting him where he is i.e. headsets replacing pocket computers, "never" is a long time. I am no sort of expert but I don't think there's any technical reason we couldn't achieve some kind of headgear that's a suitable replacement for a smartphone. After that, it's only a matter of time before everyone living is used to them being around, at which point I think they'd be just as easily accepted as cars or skyscrapers, for better or worse. My money's on it happening eventually.