Features for responsive Web design
To me, the only remaining question is whether we care about these. If we
An excerpt from Features for responsive Web design
do, rather than reinventing a new syntax for every media query someone
wants to use in a srcset, I think we’re better off letting people use
media queries directly, in which case then w and h are a redundant terser
syntax for max-width and max-height. If we don’t, srcset is probably as
good as it gets.