You're going to have to explain what you're talking about.
Everything be replaced? What does that have to do with brain emulation?
Also I think you're implying that brain emulation will lead to more "unimaginable monsters", when it could very easily be the opposite: if you can't emulate a brain then an AI has to be even weirder and harder to understand.
Dystopian futures where you exist as only as much as your can afford. It's cheapest to download yourself into a computer and slow down your computation speed than to continue to pay have a flesh and blood body.
Everything be replaced? What does that have to do with brain emulation?
Also I think you're implying that brain emulation will lead to more "unimaginable monsters", when it could very easily be the opposite: if you can't emulate a brain then an AI has to be even weirder and harder to understand.