Vocaloids were invented in 2000, with commercial release in 2004. Human singers aren't extinct yet.
It may be possible in the future for a synthetic voice to sound fully human with a full range of emotions. But I believe that human actors and voice actors will still be used because 1) it's easier to explain what to do to a human professional, 2) unions exist and they will push back against it.
Acting is an art. What world is it where robots do art while humans do the tedious manual labor?