It’s already known that Microsoft will soon you’ll be able to purchase hardware, such as Surface devices and accessories through the Microsoft Store (aka Windows Store) app in addition to apps, movies, and books. However, the section still not available to everyone.
If you want to take a peek, you can access the hidden Surface section in the Store app using these steps:
Use the Windows key + R keyboard shortcut to open the Run command.
Type the following command and press Enter:
Once you completed the steps, you’ll get to the store Surface section as you can see in these screenshots;