I guess the hope is that even if it doesn't sound much better, this will open new doors, such as being able to iterate faster on new languages, new voices and n

I guess the hope is that even if it doesn't sound much better, this will open new doors, such as being able to iterate faster on new languages, new voices and new speaking styles (singing, whispering, etc). EDIT: A big example of that is the Japanese example at the bottom. English has had far more effort put into the old model, so it's already pretty good. But the difference between the old and new Japanese voice is really striking, and they were most likely able to make the new one much faster.