This does affect users who still have a menu button on their device, as now instead of opening the overflow the menu button only opens a window with a "settings" and "help" entry, while the rest of the shortcuts are in the drawer. Other than that, it's the same Play store app you're used to, with the same wish list screen, my apps pages, and shopping menu as always.
If you have still not received the update, you can try one of the following methods to try forcing it onto the device.
- Try a simple reboot;
- Uninstall updates for Google Play Store under Settings > Applications, then reboot
- Clear cache and data for Google Services Framework under Settings, then reboot
You could also consider downloading the files from one of those mirrored links online or just wait until Google eventually pushes it out to your device. After all you wont really missing anything except a cleaner app navigation system.