The internet rabbit hole led me to a couple of Computer Chronicles episodes on Unix.
This one is from 85:
If you watch it, you might think that the Mark G Sobell guy had some very insightful things to say. If you run Linux, his name might be familiar from his Linux books, so he's stayed involved in 'nix for decades.
The second was in 89
They show a Next box early on
Then there's a Sun box with Openlook which has a sort of early Mac/Xerox look.
And then they show a SCO Xenix box running Motif.
Then an HP 68030 box running a Motif interface, which doesn't look that different from a Linux box running Windowmaker. Window-moving doesn't show contents!
Then an Mac IIcx runing A/UX with X11.
I think nobody in these videos would have guessed how prevalent Unix and Unix-likes are now. Not just desktops and servers, but embedded devices, media devices, phones, tablets, game systems.