See my reply to alschroeder. If humans can really keep up with superhumans, then that's undeniable proof that superhumans don't make humans obsolete. If humans don't realize that simple fact, then they need to grow a spine, stop blaming superpowered people who are just trying to be helpful, and accept and appreciate that humans and superhumans can fight side by side (seriously, it's not like the world is ever going to run out of evil, there is plenty of room for all kinds of heroes).