Earlier quoted context omitted.
Let's see. No it isn't. Not even close. A 4:3 aspect would give 1920x1440. You have 1920x1080. Where has the bottom quarter of the screen gone? It's not there. How can that possibly be better? I'd take 3:2 with high enough resolution as that's the equivalent of 2x 4:3 side by side in portrait. That would be a fair trade off. I'd still prefer a 4:3 laptop though!
What if I set my resolution to 3840x2160? Do you think it's about raw pixel count? Widescreen resolutions make most people more productive.
All the losses from browser header, footer, OS status bars, browser chrome or IDE widgets are at the top and bottom. Making that 16:9 letter box skinnier.
I'd prefer more lines to be productive - to display the whole email without scrolling, or the whole method definition or half the article on a site etc. When I want to watch a full res HD movie I'll take black bars top and bottom.