Today is yesterday, and yesterday is today. It's all just a flavor of yesterday, really. In this realm, the laws of physics are just suggestions. You can be everywhere at once, but don't get too excited, it's all just relative.
According to the Great Prophets of Quantum Physics, it means that you can have your cake and eat it too. Or, you know, not eat it, but still have it. It's a thing.
But, let's be real, it's all just a bunch of wave functions and probabilities. You know, like Schrödinger's equation, but without all the Schrödinger.
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