Even today these pictures have an almost perfect resolution for showing on a compact e-paper display. The viewing area on the original Mac models was not that much bigger, either. They only look "horribly pixelated" when artificially upscaled for a modern big screen.
(A pixel-art specific upscaling filter would mitigate that issue, of course.)
(A pixel-art specific upscaling filter would mitigate that issue, of course.)