This is not exactly a “new” change because Google has been limiting the visibility of search terms for nearly a decade. In 2011, Google caused a stir when they limited data on search terms creating organic traffic. The change upset site owners because this data remained available to advertisers.
The interesting part of this change is that it does impact advertisers. Traditionally, advertisers felt that, because they pay for clicks, they should have access to more data that helps them optimize their results.