The cynic in me says it will make no difference, because Tencent, Tim Sweenie, and the rest of the Epic Games stockholders care about money; not software freedom.
"It is not from the benevolence of the butcher, the brewer, or the baker, that we expect our dinner, but from their regard to their own interest. We address ourselves, not to their humanity but to their self-love, and never talk to them of our own necessities but of their advantages. "
For those like me who didn't know, this is Adam Smith.
Linked documents in other comments force Google not to charge any fees for thurd party app installs.
The mandatory registration can therefore still continue and limits can still be in place, they just can't ask for money when registering users.
They can still use the trick Apple uses to prevent malware/add an OS blacklist by just revoking certificates.
Epic's lawsuit serves Epic's needs, they're not the EFF trying to protect user freedoms.
Wording says permit from "developer website". I expect ugly lockdown when it comes to installing software on Android as freely as on PC.
Will Google still gatekeep all binaries running on Android?