Technology is faster than evolution.

Any future change in our bodies will happen as the result of technology way before it happens naturally. I'm pretty sure this is undeniable. The rate of evolution is constant. It has been constant for 3.8 billion years. The rate of technological progress is accelerating exponentially.

Technology has already allowed our bodies to improve on their natural functions. Take for example Penicillin. Our bodies are pretty capable of fighting off disease but when facing the challenge of certain bacteria our bodies come up fatally short. That's where technology comes in and one ups nature. All you need to do is eat a substance that your body is too simple to produce on its own and you'll be fine.

Face it, evolution as Darwin explained is over. We're done with random genetic changes occurring every thousand years that slightly improve our bodies. Today's evolution isn't random. It's well thought out and its speeding up.