Tab tiles got a wide grey border that makes them more visible on a white background.
📖 In addition, It also has the Read Later option marked as NEW while it is already available on the beta version. If you wonder where you can find Read Later articles, you should check a reading list button on your Desktop browser. There you will see a red dot, notifying you about newly saved items.
Update: Looks like Chrome is going to have Reading List also available on Android soon. The hint suggests that they will appear in bookmarks but they are not there yet for now.