There has been a lot of discussion about Google Instant; the new feature where search results appear and change as you type into the Google search box. Rather than add to the endless discussion, I thought it would be better to refer you to the post on that gives “the search engine expert’s view” of the new feature.
Alternatively if you think you’ve had enough of the discussion, or just want to see Google Instant working, take a look at the “We Didn’t Start the Fire” video on YouTube.