I've often wondered if anyone would still train martial arts if, in the future, combat had no place in human society. I'd say it's an unlikely situation, but an interesting hypotheses to ponder on.
This recent interview with Ip Chun covered the same idea a bit -

If fighting were taken out of the equation, would you still train? Would there be a greater abundance of IMA's or Aikido-type arts, or would MMA, boxing, MT etc still exist as a form of 'personal development' arts?

Again, I realize that fighting will most likely never be evolved beyond by humans, but if it WERE, where would that take MA's?