Well for everyone who wants to make Xbox One games it means that they will need to get access to DevKits somehow if UE4 doesn’t support UWP. Whereas if they chose another game engine (like Unity) with UWP support they don’t need to get DevKits, just a consumer Xbox. Sorry, but I fail to see how that’s a good thing for UE4 (developers). Developers can choose the enabled target platforms for UWP apps freely, so it could just be on Xbox One and not on the PC Windows store if you hate it so much for whatever reason.