Yah, I suppose it will be a while before large things like cars approach zero marginal cost. But thanks to 3D printing, nanotech, etc., many small things will. When I need new shoe laces in the future, I'll be able to hit "print" and create some almost for free. Eventually we'll have 3D printed cars and homes, thought that's admitedly decades away.
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It's almost like you are welcoming me to the future. Wow, future looks like the world with endless possibilities. Now I can see your point better. Thanks for taking time to share your vision.