You don't, it supports virtual keyboards. The pref touch-screen-display-keyboard helps making it accessible in every buffer. I use a keyboard "Keyboard Designe

You don't, it supports virtual keyboards. The pref touch-screen-display-keyboard helps making it accessible in every buffer. I use a keyboard "Keyboard Designer" so I have a very accessible Meta, Ctrl and Shift keys and movement as well. I'm sure you can achieve something similar with others.