Earlier quoted context omitted.
Can we stop with this "bill gates is watching your searches" nonsense? I know you're fascinating, but Brin and Gates may be concerned about many things not related your internet activity. Corporations in data monitoring projects, OK.
No, we absolutely cannot stop bringing up the privacy implications of an entity knowing more about us than they deserve to, and no amount of waving it away under the (false) pretense that they "need" it to do "other" things is going to work. I'll ignore the entire filter bubble issue and get right down to the privacy implications. When often people use search engines or other related websites (reddit search) to look…
If you could fit an entire Google data center into your mobile phone, maybe this kind of digital personal assistant could be taken offline, but for the current state of technology, big data requires the cloud. Even in the 24th Century, the Enterprise Computer is a centralized data store which tracks queries made from com-badges.