[ Its quite possible that Cybersex, rather than other things (nuclear war, global warming, meteors, etc) may prove to be the “extinction event” for human beings as we know them.
By that time, we may also find a way to encase our entire consciousness inside robots. That would eliminate the need for reproduction as well. ]
Also you could re-produce by “copying a computer file”, so you can still have population crisis in the so called “cyber age”.
But immortal robots of former humans is kinda scary. You ever watch “Ghost in the Shell”?
Let’s not forget the impact of advanced robotics on warfare, as foretold in this military academy graduation dramatized on The Simpsons...
“The wars of the future will not be fought on the battlefield or at sea. They will be fought in space, or possibly on top of a very tall mountain. In either case, most of the actual fighting will be done by small robots. And as you go forth today remember always your duty is clear: To build and maintain those robots.”
http://en.wikipedia.org/wiki/The_Secret_War_of_Lisa_Simpson