Google released cool new UI of Android Play Store. You just need to download the updated APK to get new UI in your phone.
Overnight the update to the newest version of Google Play began. We started getting updates on our devices as early as 6PM Central Time. If you just want to wait for it, we can't imagine it'll take all that much longer if you live inside the United States. Google's roll-out process is relatively swift at this point.
Here is the link to download Updated APK file to get new Play Store UI.
Download Play Store APK from below link :