>>10 I was thinking in non-biotic machination terms. IE your desktop computer, the machines that build other machines, the machines that build the machines that build machines, general robotics and networking typy things.
Those things just don't happen without without an inductive field that is possible by using copper (or other conductive wires) coils.
Thus, if you can figure out how to use light/fiber optics to create and sustain an inductive behavior - AND be more efficient at it - you can feasibly create a computer system that runs SIGNIFICANTLY faster than any other system known to man.
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On the topic of biotic mechanics, though: You're fucking nuts right now :D
The first problem I see is converting electric energy from the brain to light energy, and then back again. This adds a step that may not be necessary at all, and involves something that our bodies DO NOT do naturally. I say that primarily because our bodies are efficient as all hell with how energy is used, so adding a step seems like going against that natural efficiency.
The fewer steps you involve when dealing with biotic machines, the better. We're already EXTREMELY complex creatures.
Now the benefit to using a light-based medium would obviously be speed. However when taking the conversion from elec>light>elec, the process of converting it adds to the time it takes to process and essentially neutralizes any bonus you had by using a light-based medium.