They can direct us to our destination!
They can speak at our funeral, being long dead themselves (as long as there is sufficient training material recorded).
The future is awesome.
You'd have to "direct" this on a word-by-word basis: "Put the emphasis here. Speed up 10% here. Decrease vocal intensity 25%". You'd end up producing a whole "score", and it would take at least as long as the human actor puts into it.
Having done that, it would be amusing to switch it from voice to voice, as a party trick. But the result would still be much poorer than you'd get out of an actor. Really solving the work of an actor is strong-AI-complete.
Even better if its linked to the voice generation system in real time, then you can save/redo sentences etc. as you go along.
It seems that we aren’t far from being able to take those recordings and spin it into a reading of anything. Fascinating. It’s kind of scary though. Grandma’s voice can read anything. Anything.
If anyone's interested in the project, feel free to contact me at email@example.com.