It doesn't have to be about creating audio of specific text with <specific person>'s voice; it can be much more about creating audio of specific text with a wide variety of believable people's voices.

I could see this, if it becomes commercially viable, potentially being a huge boon to indie game creation, for instance, since hiring a load of voice actors to record the dialogue for an entire game is vastly more expensive than, say, hiring a bunch of different people to record their voices for 5 seconds—or even, if this ever took off, buying a bunch of samples pre-recorded (or networks pre-trained) for the purpose.