Are there specific examples of this type of harm? The only complaints that he made were that Google makes a lot of money (which I have no problem with), and that Google's conduct feels "creepy" to him (which is merely an emotional reaction).
He did hint at Google "modifying your off-screen behavior", and I was eager to learn about that as well... but then he left that unexplored too, and gave no follow-up or examples of that intriguing scenario.