"AI", especially art. I've spent years trying to learn to draw on and off and have never gotten good at it, but now I can use words to create illustrations I want in a level of quality and detail I could never dream of.
Now I just want the interface to be easier and more able to understand natural language and be capable of making directed changes better.
Lex Luthor is actually a super genius. And he can actually improve the world tremendously, such as in Red Son.
That said, Jean-Baptiste Emmanuel Zorg was still a more positive and likeable character than Elon Musk.