Microsoft's Microsoft Store for Windows 10 PC has been continuously optimized for iterations, but the Web version of the Store does not seem to have been updated. The good news is that a new Microsoft Store design has emerged.
The overall layout of the new Web version of the Microsoft Store is clearer, with application details, configuration requirements, ratings, and relevance all separated by different Tabs. It also lets you install the app to a specific device (login to the same Microsoft account) in the browser.
In the case of games, the new Microsoft Store also offers subscriptions to quick buy buttons (such as EA Access discounts), Game Hub links, and larger promotional video areas that are more visually structured.
It looks like the current version of the Microsoft Store is still being tested and not everyone can see the new version.