Google's desktop search pages have a new interface for navigating between search results. The search box is bigger, there's a new search icon and Google now only shows 2 or 3 specialized search engines next to "all", down from 4. Apps and shopping seem to be missing from the list of search engines, so you can only pick from image search, video search, Google News, Google Maps, Google Flights and Google Books.
The settings dropdown is now placed below the search box and it includes the option that lets you hide private results. You can still change search settings, languages, turn on or turn off SafeSearch, use advanced search options, open Web History or go to the help center.
Search tools are now simply called tools and they include the same options: search by date and verbatim.
Image search lets you quickly go to the saved images page and change SafeSearch setting.
Google Shopping is broken. While the homepage still loads, when you click a product image or search for something, Google shows an empty page.
Here's the old Google Search interface, via Wikipedia: