paladin181: Pretty sure by "PC" they mean "The Epic Games Store purchased games" And that this isn't some mega infrastructure for all games on all stores.
Well...
At Epic, our goal is to help game developers succeed. Throughout 2019, we’ll be launching a large set of cross-platform game services originally built for Fortnite, and battle-tested with 200,000,000 players across 7 platforms. These services will be free for all developers, and will be open to all engines, all platforms, and all stores. As a developer, you’re free to choose mix-and-match solutions from Epic and others as you wish.
They specifically mention "all stores" and "all platforms" (and the rest of the article makes it clear platforms refers to PC and the various consoles and mobile OSes).
They also go on to say
We connect developers and players across all platforms, and respect existing platform relationships and player accounts. For example, Fortnite runs on 7 platforms that are fully interoperable; the game requires no login on console, and supports multi-platform login via Facebook, Google, Xbox Live, PSN, and Nintendo accounts, in addition to Epic accounts; and supports Twitch account linking.
Besides these existing account and service integrations, we’re eager to work with partners on further efforts to connect accounts, gaming services, and cloud services for a more seamless experience.
Stay tuned for more information over the next few months.
Which suggests they will be looking at connecting you through your GOG or Steam account rather than requiring an Epic account or similar to access these services.
I think that sounds pretty positive to me, and not just for PC gaming either.