Do you want to know how the CSS WG works? Fantasai has written about:csswg, An Inside View of the CSS Working Group at W3C.
Edward O’Connor showed a demo of
position: sticky, which is similar to relative positioning in that the element takes up space, but causes the element to be “trapped” by the viewport while its containing block is visible. Everyone agrees it’s cool.
(This is an effect commonly done with JS; see for example the map in Yelp search results; or the section headers in Apple’s iPhone address book; or column headers in a spreadsheet. The proposal would trigger this effect with a single CSS declaration.)
Resolved: Add scientific notation to CSS numbers (not integers) using SVG syntax.