> For as long as there's some intellectual capability that humans have and machines don't
Careful. You're smuggling in an assumption that isn't true. Machine don't have intellectual capabilities, and this follows from what the computer as formal construct is. They can simulate the appearance of intellectual ability, as LLMs can, at least in certain respects, but appearance ought not be conflated with cause.
I don't personally believe that there's anything fundamentally preventing machines from being intelligent in the same way biological life is. Not to say that LLMs currently are.
But, if you want, you can replace "some intellectual capability" with "some capability typically associated with intelligence". Ability to solve unseen logic puzzles, for instance.