Anyone here that was there yesterday and used it, what's it like looking "through" it at the world, how does focusing on near and far work? Are the cameras adjusting focus based on where you are looking?
Yes. Marques Brownlee describes this in his latest video.
One did say, I think either from CNET or from creative solutions, which you can find on YouTube, that pass through cameras where the highest quality they had ever seen. And they are experts. It was CNET, now that I remember. And he talked about looking at his wrist watch and being able to make out the detail on his watch's text.