I work on a 27" Thunderbolt display often... and it'd be nice if we could get another breakpoint for .scalableCard.portraitCard posters...
something around the 2000px mark for 10% width is what I'm thinking, but it might need to be specific to non-retina displays. So the media query should include -webkit pixel ratios and min-resolution.
kinda like this. https://css-tricks.com/snippets/css/retina-display-media-query/
Currently on this screen, poster images are coming out at 311x511px, real life 2.75x4.125" ... they're just monsters.
Smaller subset of people, but that group of people will grow as technology gives us larger screens for less $$