Dave Hyatt, designer of XUL, responds to Dave Winer and jwz’s rants about CSS, and his points are relevant to any discussion of the future of HTML and CSS:
…while I love CSS and prefer designing my pages using CSS, I completely agree with Dave and Jamie.
…
Web geeks like to write huge articles about how they took crappy building blocks and made something cool and clever, but so frickin’ what? Points to you, buddy, you managed to mold some crappy clay into the shape of Michelangelo’s David, but it’s still just crappy clay.
The simple truth that is obvious to anyone coming at this with no prior experience is that there are fundamental building blocks that are completely missing from CSS and HTML.
See also a clarification a few posts later.