Google has been consistent with providing same user experience we enjoy on our desktops on our mobiles. This is important because mobile users are just extending their desktops or office computers to accommodate the needs. I have remote access, terminal emulation and many other work apps that look and behave similar to their desktop counterparts.
Google.com in the US on your iPhone or Android-powered device, and enter a search, you can now tap on the button to the left of the search box on the results page to see a new search options menu. Then, selecting any item in the menu will refine your search.
Official Google Mobile Blog: Google's new look for mobile