It's really about the burden of the effort, it can either be easy for the users and a pain for the developers or it can be the other way around. We can standard

It's really about the burden of the effort, it can either be easy for the users and a pain for the developers or it can be the other way around. We can standardize the ratios and sizes and that would make things easy for devs sure but then that would decrease the variety and innovation for the user. If there really were a handful of fixed sizes and ratios then that would make things like google glass, smart watches, galaxy edge or any other kind of unconventional device with non standard display that much more difficult to ship to the masses. We don't know what kind of display size and aspect ratio the next contact lens display or the next building sized display will have. So I believe it's better to keep our self open to new possibilities.