There is so much more to search than Google or OCLC.
You need to see relationships between subjects and their headings. Tags
by users are simply no substitute. They’re okay as supplements to
controlled vocabularies but not substitutes.
There’s a need to go beyond the internet and look at the systems
librarians and publishers have developed that are not accessible by
Google or the other engines.
It's an interesting view that maybe Google may not be able to replace the tools that librarians and publishers have created over the years.