Yup, also remember that this conversation was about his Space Internet that I doubt will pose a real challenge to terrestrial FO and not about Elon Musk other ventures. And also not about unwiring Mars. That I don't care and don't want to know as I doubt anyone of us will want to or live in Mars during my lifetime.
Space Internet - I think it will be a major step forward for communication of any kind and if he succeeds the implications will be enormous. We'll just have to wait and see.
To separate itself from the crowd I think NEM has to be integrated into the Space Internet