One of the major changes present in the latest Play Store version is Activity Feed, which shows what you have done on Google Play, including +1s and reviews.
In addition, Play Store 4.5.10 brings In-App purchases (IAP) indicator, which shows that whether an app has in-app purchases or not in the Play Store listing. This is a pretty barebones feature, but we can hope further improvements in the future.
Apart from these changes, there are some improvements to the reviews UI and recommendations interface.
You can wait for the over-the-air roll-out or download it from here. We would suggest you to wait for automatic update.
