The problem with dream laptops is that dreams change all the time due to marketing and newness. 16:10 screen is better largely because some fancy models today come with 16:10. 5 years ago that same feature wouldn't have mattered. It's just weird.

Just like 1080p vs 1440p. 2k vs 3k vs 4k. Just like the material of the chassis, the brightness of the screen, the weight, the stiffness, the depth of keytravel, the color scheme of the background, the placement of buttons on your window, using usb-c for charging...

I mean, I could ramble for pages about ideal features. Some of those features are important to enjoying a laptop long into the future. But a lot of them are purely whatever the latest craze is. 16:10 screen imo is of the later category.