What if the Universe is Infinite?

Suppose, for the sake of argument, that the universe really has existed forever, without beginning. Although I have objections to this, I will concede it momentarily.

Imagine the universe exists without a beginning. Does this entail atheism? Of course not. There may have been a God who created an eternal universe. Does the existence of this possibility entail theism? No, of course not.

But if the universe exists eternally, certain cosmological arguments are undercut. For example, those that require that the universe had a beginning. My cosmological argument is one such, and would be undercut should it be shown that the universe is in fact infinite.

But cosmological (and ontological) arguments that only require the universe to be contingent are not undercut. Those atheists who posit an infinite universe still beg the question of why there exists a universe at all, rather than no universe. Such a universe would still require something logically prior to it.

Can't the universe exist by necessity? I posit 'no', as I commit no logical fallacy when I imagine a "world" in which nothing exists - no matter, no energy, no time, no space. Anselmian theists maintain that God is logically necessary, unlike the universe. Thus, He may be logically prior to the universe.