Yup. In my humble opinion, the people who built X really did think through what multi user graphical computing meant.

I like X. Took me a while to understand it, but once I did, I used it hard and appreciated what it allowed me to do.

Doing stuff like dual or multi head computers. Multi users each with their own keyboard and mouse can happen with X. And if one needs another user, doing it via network just works.

X is a powerful thing.