I really don't see how Google will make Samsung and the big Chinese Android phone manufacturers (Xiaomi, OnePlus, ...) put this crap on their own custom Android distributions, especially because all these guys know that if they do it will have a very severe cost -- Besides Play and the Galaxy Store F-Droid is probably the third most popular distribution channel for Android apps on Galaxy devices, for example.

So I do think the only people who will be really affected by this are those running Google's own Pixel devices which are entirely locked into the Play ecosystem. The rest not so much.