Solving conversational intelligence is the same as solving general intelligence (AGI), so unless google has solved the latter I would expect any chatbot system to still be pretty annoying for any nuanced or real world conversation.
As per the demo, I can imagine learning about a topic through conversations with an AI. It would still be regurgitating existing knowledge, but in a conversational back and forth way, which to some can have value.
(GPT?) auto generated replies for karma building seem to be gaining traction, I wonder if it can spell the death of forums haha (most likely, it will bring in better moderation systems).