Maybe a bit far forward looking but I think the idea has merit from first principles. It makes sense to analyze things from power perspective. Of course there are other limitations as well.
If they are in sun synchronous orbit, I assume it would show up as a south-north string near the terminator (sunset / sunrise). Not visible at midnight.
If demand for AI continues to grow 100-1000x fold - there's just no way for datacenters to be sustainably built on earth. Also we already quite close for them to be built cheaper in space.
Fab thing I don't understand tho. Only reason is to bring manufacturing in US since next year China is invading Taiwan so we don't have to defend them.