If this is true, the watershed moment was actually the introduction of the television. Multiple generations have grown up glued to it and influenced by it. Before that it was radio. But each time a new technology vies for our attention, it does it differently, and a new successor comes up that changes things yet again. It is most likely that we cannot predict what the future holds from all these changes as each time it has a slightly different form and effects.

I predict the next one is a contact lens with a ticker-tape of entertaining information, and machine-learning driven "ad placements" which are phrases/sentence structure designed to call one's mind to a product's slogan without directly printing it.