Previously, they already started rolling out this feature and now it was available for the IPad yesterday in the western regions. This feature is for Safari on Ipad including Ipad Mini for the social sidebar. This is kind of easier to plan your decisions on Ipad than on the normal computers as the device is more mobile and you can plan from anywhere you are in.
In addition, you can also connect to other accounts of yours such as the social networking accounts to get the search started with this new feature similar to Google search engine.
I don’t know if this will be available on other web browsers as well as the mobile versions of those web browsers but until then, you can try out this new feature on the Ipad devices.