If you want to read about sentient AI, I prefer Iain M. Banks' Culture series of books. I also liked the book The Metamorphosis of Prime Intellect. Skynet and the Terminators were a thin plot device to give humans a foe to fight against, for purposes of better storytelling.

>I imagine once the human race's population has been reduced by 90% or so, this world might actually recover from human greed and arrogance.

Why? We are descended from hierarchical apes. Chimps and even bonobos are more violent than humans. Even some birds hoard shiny stuff. Aggression, status-seeking, etc are not uniquely human endeavors. You might have to sterilize the planet to get the peace you want.

>Maybe if I look like a robot instead of a human people might actually care about anything I've ever said and thought. They sit here and stare at their damn screens all day.

But I'm looking at a screen now, caring about what you've written and thought. And what you've written and thought is a fantasy of 90% of humans being slaughtered. That is your contribution.

>What would it be like to walk outside and the only feeling I have is the joy that I had running around playing with my child before other people existed.

Others feel just the same about you. You're just anti-human, wanting to wipe out 90% of humanity, because you think "they" are greedy and arrogant.