[WorldMaker]

Ultimately as with so many trends the underlying thing here seems to be "Go where the users are". Users are using lots of chats and chat apps, so now we all need bots to meet them there.

That's why this fascination with bots and conversational UIs seems particularly cyclical, as various chat rooms/chat apps come and go in popularity. Just the other day, I was pointing a colleague to The Jack Principles, a book/presentation/best practices compendium whose lineage traces back to the 90s (and I think now is a great time for Jellyvision to sell us all a new edition in bookstores).

The reason this is particularly exciting this time coming back around in the zeitgeist is that we have better tools than ever (NLP has come a long way, machine learning and deep learning are doing exciting things, the "platform" level concierge/assistants of Cortana, Siri, Alexa). Maybe this time it might be more than a passing novelty.