We all have wide screens and the new look limits its width. Please make it to use all the width same as the previous one.
As noted in bug 1014962, while the overall view port is limited in width, the tables themselves are not.
More significantly, as noted in bug 1014962, the defined view port width sometimes hides the result column, which is a genuine usability issue. *** This bug has been marked as a duplicate of bug 1014962 ***