Portrait displays are a technology which is sadly
extinct nowadays.
Nevertheless, the old PARC machines used such displays, even at a similar
resolution to Apple's. They occupy less space on the table and are ideal for
wordprocessing.
I'd really very much like to have an Apple Portrait Display (I think
it was called the Full-Page Display). Very nice, I used on on a IIsi,
had Xerox Smalltalk-80 loaded on it, used it just like a little Alto.
-dq