I'd love to also see something like FLIF get browser support. http://flif.info/ http://flif.info/ where the user agent could set a preferred quality for images/

I'd love to also see something like FLIF get browser support. http://flif.info/ http://flif.info/ where the user agent could set a preferred quality for images/variants based on network/device constraints. Or download the first say 20% of images on a page, only downloading more after staying on the page for a length of time.