While it's too early to tell what exactly the revamped News tab will accomplish, it's clear that it's a step in an entirely different direction. A look at the "Before and After" GIF of the News tab reveals that prominent news publishers are highlighted clearly on top, and the staggered look of numerous news headlines stacked on top of each other is gone. Instead, the tweaked News tab resembles the card format of the main Google news page or the Google news experience on mobile.
Instead of several similar stories being grouped together under one card, each story appears to have its own card. For example, a search for "MLB" hones in on the most timely MLB topic (National League All-Star voting results) and the stories of three mainstream publishers (CNN, the Washington Post and USA Today) are featured front and center, highlighted in boxes. There are fewer links per page, but individual stories are featured more prominently. There is more white space, but readers will be able to see more of a preview of each story.
According to Google, in addition to making publisher's names more prominent, the updated News tab also organizes articles more clearly. While it's clear that the new design is a lot less busy than its predecessor, it'll be harder to get an idea of the breadth of coverage or read related news stories. Like all major redesigns of Google's products, this one will likely take some time for people to get used to.