I think ISPs are going to monetize browsing history. I don't think it's right or fair that someone I can't choose not to use can do that. I think citizens should have privacy rights and should be allowed to opt out (use google if you like, I won't), but shouldn't be forced to.
I don't think they will use email content, but you can learn a lot about a person by search and browser history.
The crazy thing to me is that all the self-proclaimed libertarians in Congress supported this privacy invasion. I doubt that many of them even understood it. At least I hope they didn't, even if I wish they had.