I love this idea, but knowing Google, they'll completely screw it up like they did with Google Glass and their Chrome TVs. The only thing Google has ever done right is Search, and honestly, I moved on to better search engines from them (DuckDuckGo).
The only people that should be afraid of Google (and the NSA) information gathering are terrorists and pedophiles, so if you don't count yourself part of either or those groups there is nothing to worry about.
But honestly there must be a lot of pedophiles and terrorists out there the way people always complain about this stuff.
WRONG!
Nobody is immune to being hacked - not the NSA, not Google, nobody. It's not a matter of if but when. Someday, everything the NSA or Google knows about you will be known by criminals all over the world. They'll know the names of your kids, the school they go to, and a list of IDs for your friends (they got your friends from G+ and the IDs from the NSA.) They find the one they look most like, go to the school, and take your kid.
I can spell out countless other creepy things that can happen once hackers have your data.
Even supposing that hackers can't break in from the outside, what makes you think the NSA and Google aren't compromised by people working on the inside? Since you don't seem to mind that the NSA has your data, you would consider Snowden to be a bad person, and yet he was working in the NSA. What makes you think there aren't others? (Personally, I consider Snowden a hero.)
Your failure to worry about what the NSA does is equivalent to not worrying if the police break into your house and rummage through all your stuff. Even if they find nothing, they're still harassing you. It's why we have the amendment preventing them from doing that in the US (the number escapes me right now.)