I think it's much more important to be able to produce nice PSs/PDFs from wiki markup than to introduce even more magic into it. It's magical enough as is and most people don't have ease-of-use problems with it, but we still don't have any way of doing high-quality printing.
Actually, that's right at the top of the document I'm writing as one of the goals of the syntax. That's why, for example, I'm specifying output in terms of a DOM, not just HTML.