And to your point, I think XKCD did a comic that basically ask the question you're asking, which is what's the logical culmination of the search for "good" content in a world where machines can mass produce content. The comic I believe was about YouTube comments rather than Google search results, but the ultimate idea was that if the machines actually at least made good content that is every bit as good as what we're hoping to get from humans, the question of whether it's machines or humans is moot.

I'm not sure I agree with that conclusion, but I do believe it represents a forward step from the status quo, where machine produced content dominates but is merely in the C to C+ range for quality.