I'd love to see schema.org updated and used more. As someone still doing linked data work, albeit in academia, I mainly use it simply to provide more context to self-created, domain specific properties within ontologies using things like rdfs:seeAlso, skos:related, etc.
Ideally it'd be nice (imo) if schema.org had more domain specific extensions, similar to the bib[0] one which allows for things like comic book properties to be described.