what happens if there really is nothing
we're better at than a computer
It's not that you have to compete with computers while being naked and without tools in outer space.The line between Humans and Computers will continue to blur. Right now, you carry a computer with you in your pocket. Tomorrow you will have it in your head. And it will aid your thinking without you having to type stuff into a keyboard and looking at a screen.
If there is nothing left "we" are better at then computers, the last remaining "old" parts inside of us will be discarded and we will just be a computer like everybody else :)
Of course, it's pretty difficult to predict the future, and it's possible that human-computer hybrids will continue to outperform vanilla computers in the long term (as you point out).
You're assuming people will want it in their heads. I'd rather be naked and without tools, than become part of The Borg. YMMV though.
They all have mobiles now.
Now, people who are displaced by technology can move on to other things, but what happens if there really is nothing we're better at than a computer, in say 100 years?