Image via CrunchBaseSearch is the core of what
Google does. Search is where Google makes almost all its money. Google gives away Android for free because, well, it will make money off of search. And I don't doubt Google will keep innovating. When blogs first burst onto the scene, and
Google search results were being seriously skewed in favor of blog posts, Google tweaked its algorithms. Google will similarly respond to the content farms and the SEOed to the hilt sites.