This, in my mind, is the promise of the semantic web. The problem is, of course, that it requires a lot more work. As an author, I have to describe how my contribution fits into the rest of the web. As a search engine, results are less a linear ranking, and more a web of how topics interrelate. Designing an interface that pulls in all the relevant information and is still easy to use will be difficult.
Someday somebody will figure out how to achieve similar results without the up front effort. Otherwise, my dreams will probably never be achieved. Until then, however, I’ll continue to watch as baseless opinions win the day and potentially new knowledge is lost in the sludge somewhere near the end of Google’s long tail.