https://wccftech.com/steam-library-update-available-for-all/

Roughly one and a half months ago, Valve put into public beta their new Steam Library system, giving a much more visual feel to a user's library, offering a more interactive library and one that keeps you more in touch with the games you have as well as helping you see those that your friends are, or have been playing.

Frankly, the best part for me has been the organisational elements of the library. I've been trying, unsuccessfully, to categorise all of my Steam games for years now. I'm still failing, but I'm failing prettier. Today, the very same system has gone live for everybody, as Valve recently announced.