Where did this obsession with Widescreen come from anyways? I understand for "widescreen films", but why are all monitors wide now? It's weird that it kind of slowly crept into the norm..
The screen diagonal has always been the primary qualifier for a screen, especially for laptops.
That's a linear increase.
Production cost of a screen increases with the screen area.
A 4:3 aspect ratio implies an almost quadratic cost increase.
The more a screen's aspect ratio deviates from the square,
the more the cost increase lowers to a linear increase.
Beware of the 40" 4000x100 pixel screens in 2017!