Here is the Google Search Option Video that was provided by Google official blog.
After viewing the video here is my comments and observation :
I believe that this can be done before thru Advance Search option feature of Google, they just made it easy for those non techy guys and gals to use Google. Google just made it easy to slice the results into more specific one.
But I must agree that they made it easier. What I am interested is How can we make the post more optimized thru the search snippet. For sure the All In One SEO Pack plug-in will be updated soon. And I just hope that this will not make a major change the Google Algorithm. You might want to check my suggestion on how to increase Blog ranking .
But anyway thanks to Google for constantly improving the system 🙂