I completely agree with those of you who said that these displays will get trashed within a month or two. Demo units will have cables that will look as if they've gone to hell and back, possible missing keys and perhaps cracked screens. There will also be all sorts of scratches and nicks on the counter. I'm not saying this just to be an ##$!@ (well maybe a little), but I speak from experience having seen the videogame and computer sections of my local WM stores in pretty bad repair. They would be far better off if they kept everything within a glass display like Target does.
The Sam's Club here which sells iPads have had everything you said listed there (a subsidiary of Wal-mart), except for the cracked screens.
The iPads themselves still worked fine however, despite the abuse, but the charging cord was so screwed up that nobody could really play with them anymore, and they have to replace the cords every week.