I haven't found much here about whether implementing schema.org markup on your site for page elements such as breadcrumbs, header, footer, and so forth helps when it comes to SEO. I'm not talking here about rich snippets or tagging products, events, people, etc -- just basic Web page elements.
I seem to recall Cutts mentioning pre-Schema that Google is pretty good at analyzing a web site and figuring out what HTML is part of a header, footer, etc. as opposed to main content. So would adding schema-org markup be superfluous? Or should we assume that other search engines might not distinguish among various parts of a web page as well as Google can?
More recently, didn't Cutts mention that schema.org markup is now a major factor in determining one's position in the SERPs. I think I read this here -- in this forum -- a few weeks ago. Perhaps he was referring to rich snippets, which can help CTR. I'm just not sure.