The physical dimensions of a laptop screen are constrained by the physical layout of the built in keyboard. So unless you can design a clever keyboard that is longer than it is wide...
On the topic of keyboards, is it just me who can't stand numpads on laptop keyboards, whenever I use them my hands feel weird being off-center..
Otoh, my sis who does subtitling finds the numpad essential to use the laptop. So different strokes for different folks.