Funny that you would post these.  I was thinking about these recently, every now and then I'll ahve one on (I've only done it a few times), but a couple days ago I was thinking about a sci-fi project of mine and thought how these people on a spaceship need some kind of view, so I had the idea that of course they would have something like this that would fill up a whole wall, or be a hologram a centimeter off of the actual wall, with the environmental conditions in the room being set to match, so if you're "on the beach" there's a warm breeze, if you're "in the mountains" there's a cool chill, etc...  and I was contemplating how much of that would be considered "healthy."  Especially when you're on a confining dark spaceship in the middle of nowhere with no view.