The reason why this case is important to me is that I think the fundamental starting point of interaction design began with this demonstration.
“The Mother of All Demos,” introduced by Douglas Engelbat and the SRI team in 1968, was the first concrete demonstration of the concept of “how humans and computers can interact.” His mouse, window, hypertext, and real time collaboration systems have become the framework of the computer or smartphone interfaces we use today.
I think it is important that this demonstration started not from technological innovation, but from human-centered thinking. Engelbart didn’t see computers as a machine that replaces human abilities but as a tool that expands human thinking and creativity.
In the end, his demonstration was an event that newly defined the relationship between people and technology rather than technology development. So I feel that this demo is not just an important event in computer history, but a philosophical starting point that any interaction designer must look back on.