This particular Google Play Store Material Design makeover is mainly focused on both the app and content pages, but it will not see an extension to the overall navigation of the Play Store. The biggest change in the app and content pages would see users enjoy new animations, cover photos and videos which will be featured in a more prominent manner at the top. As for descriptions and change logs, those can now be viewed in full screen goodness, in case you like to do such “heavy” reading on your mobile device.
Apart from that, change logs are shown on apps that you have already installed, and this will see off the existing app descriptions for said apps. Basically, information concerning the apps on your device will see a bit of a reshuffle to be more intuitive.