Chat gpt can already parrot back some idea to you in the written "voice" of any famous historical figure you care to name, and remembers context from earlier in your session to inform its written inflection as well. Presumably this implies we have "line of sight" to doing something analogous in the audio space, at least in this generation. Certainly if you fed a whole book into chat gpt that it had never read before and asked it to describe the intonation of a character's voice it would have some level of accuracy (e.g. "husky" vs "meek") so I think we would want to do something similar for the AI reading. It could also probably pick up on context in what it's reading and read it with emotion.