> 2560/1600 = 1.6 (this is a good aspect ratio, the perfect laptop has a ratio ≤ 1.6)

Not just laptops, but monitors in general should be 16:10 or taller. 16:9 only became popular thanks to the computer display industry naively adopting the aspect ratio of televisions. But 16:9 comes from the film industry and has nothing to do with computer productivity. It's a shame that so many monitor manufacturers still focus almost exclusively on 16:9 (or even wider, when width is easily achieved by multiple monitors, side-by-side). I'm fine with the wide options existing, but give me some taller options, too, please.