I sure hope federated spaces will be viable, I have my doubts, although I'd love to be wrong.
It's just, there are a ton of benefits to centralization, despite all its faults. And I hope federated alternatives can make up for that. I really don't want a fractured internet, with thousands and thousands of small insulated communities.
Yeah, I don't see what the big deal is. I won't be switching from Windows anytime soon, for various reasons, but I very much appreciate being able to have access to a local linux environment without having to dual boot.