I worked with an SGI 2400T workstation and it came with a 4:3 aspect high resolution monitor (4K I think, different from today's 4K). Later workstations probably had wider screens. However even that old machine could display to a wide variety of screen sizes. I connected ours to an NTSC projector and they were often used for rendering movie computer graphics (though rendering doesn't depend on the display size). If I remember correctly the pixels were square by default, but there was a lot of control over rendering and display. NTSC at that time wasn't even a very firm standard, lots of companies implemented it differently and hi-res displays tended to be custom with no standards at all (used for air traffic control for example).
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I worked with an SGI 2400T workstation and it came with a 4:3 aspect high resolution monitor (4K I think, different from today's 4K). Later workstations probably had wider screens. However even that old machine could display to a wide variety of screen sizes. I connected ours to an NTSC projector and they were often used for rendering movie computer graphics (though rendering doesn't depend on the display size). If I remember correctly the pixels were square by default, but there was a lot of control over rendering and display. NTSC at that time wasn't even a very firm standard, lots of companies implemented it differently and hi-res displays tended to be custom with no standards at all (used for air traffic control for example).