For laptops, one of the main limiting factors is the "width when in a bag", or simply the "height". Standard 15"/16" is the limit of most backpack widths. Goin

For laptops, one of the main limiting factors is the "width when in a bag", or simply the "height". Standard 15"/16" is the limit of most backpack widths. Going to 3:2 or 4:3 would simply mean a narrower screen, if you want to keep the same backpack-ability.