The more I see touchscreen tablets used like this, it reminds me of more places becoming like my science center. Even years ago, various places like it and certain tourist attractions used information kiosks with touch-screen interfaces throughout the place. Of course, using much bigger and more expensive equipment. But at least, this looks like a part of the undertaking of the future these places promised.
More environmentally friendly? I don't know. Though the amount of world-wide Apple Stores and the amount of things displayed in them would be hardly a small fraction compared to the amount of iPads in people's hands. If they put them in every store, wouldn't the count hardly reach Over 9000?
That's still under 1% of just 1 million of the iPads sold. I doubt the making of these is as much of a footprint that people are making it out to be.
i also agree that it markets to other businesses about the application of these things (from an idea perspective) into all sorts of places. Various department stores, malls, etc. Maybe even replacing some of the old, still expensive to repair, and outdated hardware in your favorite science and other museums. Even though people may state about the cost of the iPad, it's a heck of a lot cheaper than the current hardware used to place the existing kiosks out there. Put a tablet in the right box, so that the home button and other buttons aren't accessible without opening the thing, and you have a high quality touch-screen kiosk for a tiny fraction of the price.
Could other tablets be made to do this? Yes, but they also don't have their own stores to make these displays to entice this new market for cheap kiosks. This is using the advantage of actually having dedicated stores, around the world, selling your product.