The second comment on the target page has a nice explanation on why this weird resolution of 1366x768 is so popular. Apparently individual screens are cut from

The second comment on the target page has a nice explanation on why this weird resolution of 1366x768 is so popular. Apparently individual screens are cut from larger sheets of pixels. Using the same vertical resolution for 4:3 screens (1024x768) and 16:9 screens (1366x768) makes it possible to cut them from the same sheet, pushing down the manufacturing costs.