Surely most of you by now have made use of the site search box that Google shows you when you run a search for a company name. Go ahead and try it, run a search for “Youtube” on Google and you’ll see a search box appear within the first search result from which you can run a search directly on of Youtube.com. If you’ve used this in the past chances are this is what you’re used to:
Google aims to change that by making this search box more prominent (placing it above the sitelinks), and adding support for Autocomplete.