...or at least, some of it. Images! Flexbox Layout! Grid Layout! Selectors! Variables! Color! Media Queries! Animation! Polyfilling! AMA! Image Values Defines several useful image-related features. Level 3 is in CR, and features are showing up and unprefixing as we speak. http://dev.w3.org/csswg/css-images-3 The image() function Basically a souped-up url() image("foo.png", blue) background: image(