At last! Google makes its new UI for the Play Store official
“The Google Play Store has over two billion monthly active users coming to find the right app, game, and other digital content. To improve the overall store experience, we’re excited to roll out a complete visual redesign. Aligning with Material design language, we’re introducing several user-facing updates to deliver a cleaner, more premium store that improves app discovery and accessibility for our diverse set of users.”-Google
Even though the Google Play Store now uses Material Design, there is no dark mode and even with the system-wide Dark theme available with Android Q toggled on, the Play Store continues to appear in Light mode. Since this is a server-side update, there is nothing for you to do but sit back and wait for the new UI to hit your Android device.