This is huge for many reasons, but namely, this could finally lead to the "semantic web." Metaweb's video, which is linked to in the article, explains part of the "how".<p>The problem with the semantic web is that many need to embrace it. Many people need to tag text with these "bar codes" (uniquely identified entities). That can take a big effort and there has to be a ROI for this big undertaking. The other is that there is no standard. Well, Google just solved those. With a dominant market share, you don't need someone to agree on a standard, you just force them to--or else they lose out to competition. And as far as the ROI in tagging web pages? Well, what's the ROI on SEO? This will bring about a new form of SEO, except that Google can now undercut many of the search results and answer many of the queries directly--so that'll get interesting... and I'm sure Wolphram Alpha certainly agrees.<p>Google was also smart to buy Metaweb in order to give web app developers a good reason to use their entities and just FB's open graph entities.<p>Congrats to the Metaweb team! Freebase + Wikipedia are two of the best gifts to humanity.