This is a welcome and logical development in the world of web search: get realtime google search results as you type. No need to hit that search button anymore. What has stopped a search engine from doing this previously? I’d wager nothing, but it sort of takes the search out of search engine and dilutes the magic of googling a bit. I’m satisfied with the interface and results it produces, although there needs to be more of a notification as to when the search results are updating.
Check out Google’s pep talk about it: