KitGuru tried the Asus TP300L Transformer Book Flip
A quote from the article:
The Asus TP300L Transformer Flip is a 13.3-inch thin and light laptop that doubles up as a Windows 8.1 touch screen tablet. This is a neat trick that hinges, ahem, around the hinge. Instead of simply allowing you to open the screen and fold it back to a comfortable viewing angle you can swing the screen through a full 360 degrees until it ends up on the underside of the keyboard.Asus TP300L Transformer Book Flip Review @ KitGuru