> I just can't think of much besides a major advance in the formal software verification niche, which still almost nobody would use...
The reason is slightly different here.
What's so desirable here is an AI system with such general intelligence that it is capable of such mathematics by itself as a consequence. Not because the mathematics is so useful, but because the required reasoning capabilities are at such a level that, we could speak of an artificial intelligence that is meaningfully "general" about any problem.
It's a decent approximation of "able to solve any problem" that we can still reasonably test.
> Let's be a little more concrete: do you think FormalGeo [1] is a big deal?
It looks to be an interesting approach in modelling mathematics, and their use of machine learning is an interesting novelty that may pave the way to more useful general mathematics systems, but I can't find much about how these systems might interop with current/'generative' AI systems.
And that last bit is one of the big roadblocks for current AI. They're very weak at reasoning, but we can't directly interop to (e.g.) LLMs, so we can't compensate for that weakness.