Jef Raskin was passionate about user interface design, but had a completely different approach. The realization of Raskin's thinking is the Canon Cat.[1] Video demo: [2] It's a machine for text editing with the minimal number of keystrokes. There are special "Leap" keys, and a "Front" shift for extra characters on keytop fronts. There's no pointing device.

It's an elegant concept, but nothing one would think of as a GUI today. It's more like something that would appeal to Markdown enthusiasts.

[1] https://en.wikipedia.org/wiki/Canon_Cat [2] https://www.youtube.com/watch?v=jErqdRE5zpQ