Technique to manipulate electrons with light could make computers much faster

> No, because even at the speed of light, a trip around the earth is 133ms.

Sure you could. End-to-end latency isn't necessarily a deal breaker. There would be big design problems for sure, but there are already CPUs that have nearby circuits running at higher rates than further away circuits, with async communication in between. And there have been clock-skew tolerant designs for decades to get around speed of light problems even at ~1cm distances. It's common to use the H-tree to ensure that all clock paths are the same length from the clock source, in other words the latency is factored out by making it uniform across the die.

Some references & examples:

https://en.wikipedia.org/wiki/H_tree

http://users.ece.utexas.edu/~mcdermot/vlsi-2/Lecture_8.pdf

https://web.stanford.edu/class/archive/ee/ee371/ee371.1066/l...

I read this book Artemis by Andy Weir recently (the guy who wrote the Martian) and it mentioned a moon Internet, and it was like 8 seconds away from the earth Internet or something like that. However, and the book didn't mention it, but what if a computer could be constructed that could perform extremely large calculations, and it was cheaper to produce there? In the book, they used a lot of glass for decor, because the ingredients to manufacture it were byproducts of other manufacturing already present, but something like that could be possible in space.

I like to imagine a satellite orbiting earth, with a little factory onboard, and it would send out probes and repurpose all the space junk in orbit and convert it to energy or use it to build stuff.

A planet computer could be expanding itself in that same way, and even though the calculations' results might be delayed, that might be more effective.

If humans make it another couple hundred years, they're gonna get to start thinking and building that stuff. That'll be cool

Instead of having RAM and a CPU, you would have a neuro network like structure using light.

Than the latency is not relevant because it would optimize around it.