Google seems to be readying a new Google Play device client version, which will debut alongside Android 4.4 and brings some user-interface changes. According to a report in Android Police, which got hold of the APK file for this Play store client version 4.4, location change for menu is going to be one of main changes.
Google will be including slide-out menu in Google Play version 4.4, which brings Play Store in sync with most of the other Google applications for Android like Gmail, Google+ and Google Keep.
The default slide-out menu will include links to Store Home, My Apps, My Wishlist and Redeem. My Apps will change to My Movies/ Magazines/ Books etc. depending on the section you are in. While in section, a new menu link for Shop will also be available.
No other details are available at this point but we will not have to wait for long to see it roll-out, as it is expected to come with Android 4.4 if not sooner.