Changes to Google Play Store UI save you a "tap" when updating your apps
This is because the new update separates your list of installed apps from the list of apps waiting to be updated. With the Installed tab, you can choose to have your apps listed in the app by alphabetical order, by last updated, last used and by size.
Google has done a great job with the Google Play Store. Even if the recent UI changes save you just a nano-second with each update, it gets you to your updated app that much faster. Besides, over time, all of these bits and pieces of seconds that you're saving do add up.