Maybe you or a friend/colleague/co-worker are into Robotics. Maybe you want to humanize that interaction with Professional Voice Prompts. Be you a hobbyist, scientist, roboticist, or evil-genius planning on taking over the world, your robot creations will sound better with professionally recorded speech.
With so many voices from which to choose, speaking so many languages, you could make your own See Three Pee Oh-ish translation droid. Just imagine the possibilities.