I did some work with the publishing industry back in the 80s, and one of the projects had some portrait-mode 200dpi monitors for editing. Absolutely wonderful things; we're only now starting to get that kind of resolution again.
As it was, I found it annoying enough to go from 1152x900 in 1992 down to 640x400 in 1993, and didn't get as good a monitor on my main work machine until maybe 2009 or 2010. (There were laptops with 1280 or more pixels before then, but we didn't have them; our Corporate IT department always preferred to get hardware with more color depth instead of more pixels, thinking for instance that 640x480 with 16-bit color was better than 800x600 with 8-bit color. Nope.)