PC storefront GOG is in the throes of updating its Galaxy client to version 2.0, and its ambitious aim is to integrate all game libraries and friend lists across PC and consoles into one pleasingly convenient place.
form offers a smartly featured, and optional, Steam-like client for buying, browsing, and launching GOG games. However, its upcoming 2.0 release is designed to create what GOG calls "the all-in-one solution for the present-day gamer".
It's intended to enable you to import all your game libraries from PC and consoles so that you can organize them into a single master collection. You'll obviously only be able to launch your PC games via the client, but GOG says it intends to have integration with all major platforms. There is no confirmed list of what might be, but it seems reasonable to assume the likes of Steam, Origin, and the Epic Store. Additionally, you will have access to all your achievements, hours played, and games owned across all platforms, on both PC and consoles.