According to the Wall Street Journal, Google will in the coming months to make major changes in how their search results are generated. This kommmer become one of the biggest changes in the Google search engine ever. The new feature will be something called "Sematic Search" and is based on the search engine understand the meaning of the keywords and should also be able to distinguish between ambiguous words.
This will of course involve a great deal of keyword optimization and how different pages are ranked by Google. Read the entire article from the Wall Street Journal here