How are these authoritative sources chosen? This sounds like it would be rife for manipulation. Plus, just relying on an appeal to authority as the validation of the information will not weed out mistakes or errors in the content.
What are the standards for these other media results it will provide? News articles, blogs, studies, etc. Some might be better than others depending on the topic. The news and journalists are supposed to be the old school contextual engine. How do we see an automated version being any better quality?