Soon enough all video game stories and dialogues and reactions will be handled by ai.
Very unlikely.
AI's already pass the Turing Test, and given their new expanded use, their training will accelerate. I would be surprised if he don't have Turing Test qualified AI's on our phones (via Siri, Google, Alexa etc) within 5 years. At that point it becomes financially beneficial to do it in games because it will be easier than writing and recording voice scripts.