Google A.I 's speech indistinguishable to real human speech

"...enabled by advancements in automatic speech recognition, text-to-speech synthesis and an understanding of how humans pace their conversations."

The masses make it way to easy for google by agreeing to their vague "user agreements" that give them free reign with data collection (mic tapping on android?). What else can be done with all that information?
I find it quite terrifying.