I think people are missing the point here...

Even just with the Powerset dataset, Microsoft now owns a significant number of concepts and the semantics and context that bind then. Without much effort, they can easily use this to improve the quality of their rankings simply by giving them a yard stick to compare to.

Is this page that talks about "flags" relevant to programmers or to heraldic buffs? Just check which Wikipedia page it compares better with.

With a lot of work by a lot of smart people this could become the first step in the long road to the much fangled "Semantic web"... or at least, some type of semantic search. Frankly, I'm surprised Google didn't buy them first. Unless they're already working on something similar.