Obviously, these are not aimed for optimized display of large bodies of text. Along the same reasoning, the book/monitor format is not optimized for non-literate applications.

The demos are quite interesting. It's as if Wii controllers have become self-aware. Obviously, potential is lost when opting for physical items as opposed to holograms, but until simulating weight and feel is viable, these miniature devices do have a place in a myriad of activities.