Google announced that they have acquired Metaweb, a company that maintains an open database of things in the world (they called it entities and it was part of Freebase). I believe when Google can take advantage of entities developed by Metaweb, semantic web ideas can be one more step to reality as you can use more complex query such as "actors over 40 who have won at least one oscar", which is not applicable on current technology (even by Google).
Even though Google has done a lot of things in the past to enrich their search capabilities, such as searching for news, dates, events, images, videos, blogs, and many more (including becoming a calculator and converter for many metrics), they still can't do complex query which involves words that may be ambiguous or long query such as displayed above. With entities, which links all the related concept into one entity, this problem will be solved and it will enable users to have better results by using more human friendly (natural) keywords.
I'm looking forward to see the results of this acquisition
You can take what Metaweb is working for in a video below. It's from Metaweb itself.