Earlier quoted context omitted.
IMHO 16:9 is best for coding. You can have multiple files side by side. Or a terminal next to your editor. When Debugging: Watching variables, call stack, ... next to your code.
16:9 fine for desktop displays where its usually large diagonals, but on 15' or smaller is kinda lose too much vertical space. Anyway is about personal choice and currently there isn't much choice for 3:2 laptops for reasonable price/specs
You could see it that way, but you could also say that you gain horizontal space ;)