As difficult as this is, what I'd really like from Google Scholar is being able to ask it "What is the state of the art on X?" where X could be 'document classi

As difficult as this is, what I'd really like from Google Scholar is being able to ask it "What is the state of the art on X?" where X could be 'document classification' or whatever, and in return I'd get ranked answers. Ranking by number of citations doesn't quite give you that.