Whether we like AI or not, LLMs did open up a horde of use cases that were impossible a few years ago. Orbital data centers are not like that: their value proposition is that they will provide the exact same service already offered by land-based data centers. So the only way for it to make economical sense is if it's cheaper. It's not.
It's more like blockchain than LLM: there's no clear value proposition and you have to squint really hard to see any perceived benefit.