Just skimmed the article but my guess is that it’s a dream type experience where if you turned around 180 and walked the other direction it wouldn’t correspond to where you just came from. More like an infinite map.
It's trained on moving around dust2, so as long as the previous frame was a view of dust2, the next frame is very likely to be a plausible subsequent view of dust2. In some sense, this encodes a map; but it's not what most people think of when they think about maps.
I'd be interested to see what happens if you look down at your feet for a while, then back up. If the ground looks the same everywhere, do you come up in a random place?
It probably depends on what you see. As long as you have a broad view over a part of the map, you should stay in that region, but I guess that if you look at a mono-color wall, you probably find yourself in a very different part of the map when you look around yourself again.
But I am just guessing, and I haven't tried it yet.