New Google Play Store brings review editing and in-app purchases indicator (get it here)
- Activity Feed
- Stars are green instead of blue
- Avatars are circles not squares
- typography change
- New layout for reviews, including your own
- Indicator for in-app purchases
The other big thing, besides the warning note which apps contain in-app purchases, is the ability to edit or completely delete your app review. You also get to share your activity feed on Google Plus, with all the comments, +1s and ratings you've given to apps.
source: GappsEarly
Things that are NOT allowed: