From The Ongoing Computer Revolution, Butler Lampson (emphasis mine):

Xerox asked us to invent the electronic office, even though no one knew what that meant. We did, and everyone’s using it today. That makes it hard to remember what the world was like in 1972. Most people thought it was crazy to devote a whole computer to the needs of one person—after all, machines are fast and people are slow. But that’s true only if the person has to play on the machine’s terms. If the machine has to make things comfortable for the person, it’s the other way around. No machine, even today, can yet keep up with a person’s speech and vision.