OWG has mentioned this before and posted on semantic search, I found a very good article on the subject, except below and a link to the fill article:
How satisfied search engine users are today is an on-going debate. However, there is wide consensus, from a scientific viewpoint on the competency of the current search engines: They are half-way to the target and there is huge room for improvement. Semantic search is now under the magnifying glass and the question is "can semantic search be an antidote for poor relevancy?"
source and full article
How satisfied search engine users are today is an on-going debate. However, there is wide consensus, from a scientific viewpoint on the competency of the current search engines: They are half-way to the target and there is huge room for improvement. Semantic search is now under the magnifying glass and the question is "can semantic search be an antidote for poor relevancy?"
source and full article