Here's the privacy policy: https://fiber.google.com/legal/privacy.html

So it looks like they know which shows you watch (the same way Netflix does).

Other departments of google don't know which websites you go to, "except with your consent." There can be a lot of mischief hidden in those 4 words.

While this would normally be a concern, I don't think many people trust Comcast or Time Warner any more than Google.

Comcast and TWC don't wrap all their services in a single, trackable userID.

Yeah, If they show me one more ad relevant to my interests, I'm deleting my Google account all together!