Blind computer users, for example, have no use for a screen, and they most often use an interface that is either tactile, in the form of refreshable braille devices, or audible, in the form of screen-reading software or digital books. We might also reconsider our “essentialist” thinking about the keyboard and the mouse and not just because of the technologies that we perceive to be specific to disabled people. Speech recognition technologies, while far from perfect, are already accurate enough to allow writers—if that is still the correct term—to compose documents without the need for typing.
While skeptics may say this will up the cost, I will argue that it will lower. However, I think we might run into some problems with making audio voices more accurate to suit the needs of the blind. Also we may need a screen if the blind person is communicating with someone who can see.