Google Play's new card-based UI officially rolling out
We've seen the leaks for a while now, and today Google has officially announced the Play Store redesign has started rolling out to users. The new design looks to unify the aesthetic of the Play Store with the rest of Google's products, so the dark colors have been swapped out for light, and of course everything has been moved to the card UI that Google has adopted.
The new version of the Play Store is rolling out now to devices running Android 2.2 and higher.
source: Android Blog