In schema.org google, yahoo and bing work together to get the structural data. It is good for developers and search enginer experts to search results. This technique makes it better to search movies or other stuff with good and appropriate results.
schema gives webmaster tools about how to reach good ranking in search results. schema uses meta data to do searching in your site.
Google suggest that it is different to search the results by just markup because different search engines have different techniques but schema is the site that do all the tricks for search engine handling.