The Imagewriter had twice the DPI of the Mac screen so I don't think they were overselling it. WYSIWYG was a big deal at the time and it did what it said.
Remember this is a time when macs still did not display vector fonts (Adobe Type Manager just came out in 1989 and was not free) and of course there was no antialiasing because it was a 1 bit display.
Remember this is a time when macs still did not display vector fonts (Adobe Type Manager just came out in 1989 and was not free) and of course there was no antialiasing because it was a 1 bit display.