Semantic web.
Hunch is trying, other startups as well. You need so much "opt in, we will find cool stuff (after 200 questions)."
The big boys of online data preferences who Could do these things would be Google, perhaps FaceBook (which still brings up ridiculous unrelated ads to my interests, however, I don't "click" any apps or "like" many pages out of privacy). More on FaceBook, even my "prolific" friends (checkins, 200-400 friends, likes and friends with 100 or so movies, bands, apps, etc.) still don't click ads.
NetFlix seems, after 4 years, of finally getting a semblance of "interests" down.
That is quite a bit of data, time length, and me, the user actually rating the movies I watch in a semi-diligent manner.
I would, in fact love to log onto Google, or wherever, see my "bored" category of movies I may like to watch online, at the theater, local events going on that evening, something coming up tomorrow and all somewhat related to what I would enjoy, not just "pushing" or scraping a bunch of different calenders / pooling app info together.
Very difficult problem.