Really good content will always rank very well in Google search. I'm not talking about articles that are crammed with keywords or overly optimized for SEO, or the so called SEO content. The articles that are going to rank are those which are truly useful to the reader and answer questions they are most likely to ask. That's another reason that Wiki pages rank so well as they are in depth, lengthy and contain truly good information that serve the readers. These type of pages are not written from the 'seo' perspective but from the point of view of being of service to the reader. For that reason, content will always be in fashion, but writing content specifically geared at tricking Google will not.