Google Testing New Search Interface

Looks like Google is testing a new search interface. Last week some Google users noticed a new UI which includes a new top navigation bar along with search options and filters. Currently, these search options can be found on the left had side bar.

So what is Google up to exactly?, there is a lot of speculation that “Ad’s” could now be moved to the left of the screen, with the right hand side of the page being used for the “Knowledge Graph” and  content pulled from Google+.

What do you think of this new interface?