Will Baraza questions and answers be ranked higher than Quora and Stack Overflow in Google search? When Google starts adding more services with content created by users, will it be harder to rely on Google search?
At one point is google "impartial" search engine or when does it become a funnel to their own services?
You can see it started to happen with the ITA flight software acquisition a few years back (http://www.google.com/press/ita/) - now google flights now beat out every booking engine for any flight query.
They do have widgets such as Google Flights pop up when it is clear the user if looking for airline tickets but that's not an indication that Google funnels all their own services for the heck of it. First of all, the widgets such as Flights and People Bios are not in the actual search results, but appear as separate sections. I believe the actual search results are sacred and are exempt from being tampered with, even for Google's motives.
Second, flights are a very specific and objective thing which makes their Flights widget extremely useful. If I'm searching for "flights from lax to ord", I'm going to get all flight times available without even leaving Google. The same cannot be said for most services such as Baraza, where the quality of answers/questions is very incomplete and subjective.