I always have to laugh to myself when I read these "my iPad screen is scratched!" threads.
I have had 3 different iPads and have at least 20 friends with them and I've never seen a scratch on any of them. I don't know how people manage it. You really have to be careless to scratch the screen. Rubbing it with a sandpaper or a rag you picked up off the floor of the garage. I almost blew my coffee out my nose when I read the post above about not putting your iPad down where it might pick small stones or sharp metal objects on the inside of the cover. Are some people setting these down on a work bench in a machine shop.
Ummm...No I have never sat my ipad down in a machine shop. My wife is OCD about our home and I only sit it down on the coffee table (which you could eat off of), the sofa, or my lap. So your sandpaper or garage rag would be way off base. I honestly don't know how I have managed it either but I can assure you it wasn't carelessness.
Now if you have toddlers in the house, I can see this happening. But if you use common sense and never wipe the screen with something that has rocks or metal shrapnel on it, you'll be fine.
Oh, and to the posters that claim that the smart cover scratches or damages the iPad. Absolute nonsense. I've used mine since day one, yanking it on and off and at times rubbing it back and forth across the screen to clean it, and have never had a single mark.