As Google gets better and better at determining what blocks within your website serve what purpose, links within your main content are becoming much more important.
Google has been talking about the Knowledge Vault, an upgraded Knowledge Graph that touts "automatic knowledge base construction" and doesn't rely on community-curated databases.
Bing says it has streamlined technical searches, including easier API and code search reference queries, as well as simpler access to information about software and Microsoft products.
Much may have changed through the years in SEO, however the importance of the title tag can't be overstressed. Here's how to create title tags that state who you are, what you do, why anyone should bother to click, and why Google should care.