On the other hand, I recall a lot of "personal assistant" predictions in which phones were personal assistants, not just glorified calendars. As in, able to call the other person and do a live negotiation of times over voice, possibly with the other person's assistant. We don't have that yet; that turns out to be harder than we thought. Even the recent trend towards "bots" are still focusing on people interacting with the bots; nobody's brave enough to have the bots reaching out to people other than their customers and interacting with them yet, AFAIK. (Those who seem to use a lot of humans in the backend.)