Matt Katts, Google's main "spam fighter" tried to explain how google might work in 2009. He said that the company will keep paying attention to the universal search. That is connecting into SERP all the types of database, not making the users search for them in special categories.
More advancement is expected in the matter of blogs, videos and pictures, and they will even compete with the traditional search of information. The collaboration with YouTube will become stronger.
Also, google is expected to allow gambling advertising, which, earlier, was forbidden.