Just found out that there was a project called PianoText.
Users do not need a computer keyboard to type - they just need their (electronic) piano keyboard.
Their idea comes from the Stenotype, i.e. typing chords and syllables simultaneously with a few fingers instead of typing just individual characters. (This was something that I learnt only a few months ago.)
Unlike the mainstream computer keyboards, Stenotype designs have no baggage from traditional typewriters, and have very progressive and ergonomic designs to begin with - very much like some designs of ergonomic computer keyboards: