The moment it "clicked" for me was accessing an app and paying for its premium features using my wallet. I didn't sign up. I didn't provide any information about myself.

Having a wallet is effectively having a pseudonymous account to every dApp that will ever exist. Likewise, the developers don't have to store any of that information or care about auth, authorization or payments.

This obviously won't translate to everything, but it does show how some presumptions about the way the web has to work(just because it always has worked that way) are being completely turned on their head.