Text to speech, when it sounds good, is not necessarily meant to replace a great VO artist.
It is meant to help you get a VoiceOver FAST, and sound better than the average person. It's also great for videos that don't warrant spending $100 on VoiceOver.
But can it actually compete with a REAL VoiceOver artist?
Well, I took a clip from a professional VoiceOver demo, and had Synthesys do the same VO. Does it compete? You decide.... listen to them both here....