>Google Now recommends news articles to me, it can give me reminders about upcoming events from my emails and Google gives me some personalized search features (ie. if I type "frequent flyer number" into the default google search bar, my number appears, scraped from an email years ago). Those features have a utility that I couldn't get from an application that didn't track information about me.
And I think that's the main difference between our viewpoints. Personally, I'm not ok with a company having so much information about me just for the sake of convenience. I'd rather have to write my own scripts to scrape through news feeds or just continually check blogs that I like rather than a company having all that data about me.
We are living at a time, imo, when data is the most important asset. And companies like Google are one of the biggest purveyors of it. It's dangerous when a company could have enough information about you and have the tools to know exactly what makes you "tick". They could provide services to make "specially crafted" advertisements that would manipulate you at a scale even more than they do now. "You like tall blondes? Here's a computer generated tall blonde that talks about the new eau d'toilette and how it seduces her! Buy it!"
It's bad enough that companies are using methods to addict their users to make their apps more profitable now, imagine what a world it'll be when they'll have the technology and ability to do it to the point that no one could possibly refuse their advertising.
Now I realise that this is taking it to the extreme, but my point here is precisely that we need to consider these possibilities in case they don't catch us unaware and when it's already too late to do anything.