My hunch is it won't be much different, even when we can simply ask a machine that doesn't have a cached proof, "prove riemann hypothesis" and it thinks for ten seconds and spits out a fully correct proof.
As Erdos(I think?) said, great math is not about the answers, it's about the questions. Or maybe it was someone else, and maybe "great mathematicians" rather than "great math". But, gist is the same.
"What happens when you invent a thing that makes a function continuous (aka limit point)"? "What happens when you split the area under a curve into infinitesimal pieces and sum them up"? "What happens when you take the middle third out of an interval recursively"? "Can we define a set of axioms that underlie all mathematics"? "Is the graph of how many repetitions it takes for a complex number to diverge interesting"? I have a hard time imagining computers would ever have a strong enough understanding of the human experience with mathematics to even begin pondering such questions unprompted, let alone answer them and grok the implications.
Ultimately the truths of mathematics, the answers, soon to be proved primarily by computers, already exist. Proving a truth does not create the truth; the truth exists independent of whether it has been proved or not. So fundamentally math is closer to archeology than it may appear. As such, AI is just a tool to help us dig with greater efficiency. But it should not be considered or feared as a replacement for mathematicians. AI can never take away the enlightenment of discovering something new, even if it does all the hard work itself.