I really like the mil-spec ruggedized laptops. I look down a row of those, and it really strikes me how they're all the same size, they're covered in ports (behind little gasket-protected doors), and they are so unapologetic about size and weight that they have sturdy carry handles attached.
So what I really want most is a standardized form factor. Then my concern is for the closely related concepts of power, cooling, and heat dissipation. My Third choice would be 1920x1080 display resolution or better. After that, battery life. If you're designing your laptop to be too thin and light to accommodate a standard TRS audio mini-jack, you're not designing for me.
The other thing lappie makers are doing is touch screens, which are just awkward on a laptop, and usually unusable in a docking station anyway. Never mind about turning the function key row into a touchscreen.