Social Media Is the New Smoking
Yes, if you follow the lifecycle from exclusive expensive gadget only the rich can afford down to ubiquitous device which affords no status it would seem likely that conspicuously demonstrating you are beholden to the little box will be avoided by the upper strata, not being busy and not needing a phone because you have 'people' for that will be the new norm. The truly wealthy will be carrying a book.