Draw a character in as few pixels as possible. You will probably end up at 8-10px height. 6 or 7 is possible but looks like shit. Make a display with as high re

Draw a character in as few pixels as possible. You will probably end up at 8-10px height. 6 or 7 is possible but looks like shit. Make a display with as high resolution that it becomes totally unfeasible to read this character without a magnifying glass. Then you have reached "high" DPI. The transitioning all the way down from 320x200 to today was possible because the same character was always readable, even though it previously covered half of the screen.