I agree that the syntax isn't great, and a corresponding set of CSS rules would be welcome, but this does solve a problem. What I'd love to see is something si

I agree that the syntax isn't great, and a corresponding set of CSS rules would be welcome, but this does solve a problem. What I'd love to see is something similar for bandwidth sets, so lower bandwidth connections can be sent lower quality images. And then for both features to be made available for video tags.