As I walking to class this morning, I was struck by this thought. Historically, the most popular answer to the cosmological argument has been an infinite regress of causes. (That's why the Kalaam argument has such crowd appeal.) And currently the most popular answer to the fine-tuning argument is a multiverse, and probably an infinite one. This shows a kind of inevitability of infinity. Either you believe in an infinite being (assuming one can argue that the First Cause or Designer is God) or you believe in an infinite number of finite beings. In any case, it is an impressive fact about our dim and finite intellectual faculties that they can show us the reality of infinitude. There is a kind of paradoxicality here: learning that there is infinitude (whether an infinite being or an infinite number of finite beings) shows us how limited we are in comparison to that which is not us, and yet it is an impressive feat that we can know of infinitude.
Maybe there is a design argument here, too.