Valve has upgraded the Steam store once again in two parts: one focused on helping developers, with the other to help users find what they want to play.
For developers, Steam Playtest is now available for everyone. This is the feature that lets developers have a completely separate install option on their Steam page, inviting users to apply to help test the game. This way developers don't mess around with Beta keys, mailing lists or anything else. Just enable it, then let users come and help. Since testing it, Valve has added a feature to limit it to different countries too, which can help developers test online games and regional servers.
On top of that Steam Playtest now has their own community hub for each game, so developers can easily post announcements and other things only related to the tests.
For us normal users, they've also now published new ways to explore the vast library of games available on Steam. After being available in their Steam Labs area for a while, this expands the navigation bar at the top of Steam when you hover over it to include New & Noteworthy game lists and a huge assortment of dedicated categories. Each of these new categories comes with a dedicated splash page too.
It pretty much bundles most of what you might want under one big menu, including platform lists for macOS and Linux along with VR Hardware and Software too.