[geraneum]

This might be beneficial for visually impaired if the performance (closer to natural voice) is better than the default text-to-speech softwares on the OS. I think this is an important factor.

However OS makers can catch up and threaten the business model of this software by integrating a better TTS.

[hopesthoughts]

I wouldn't recommend using natural voices to read anything long. They definitely aren't fast enough. Maybe reading short emails and things like that, but when you get to long articles, it takes too much time. I also think that when a voice pauses to breathe it sounds more creepy than natural, and wastes more time, rather than benefits me in any way.