> I'd find it helpful to know to what degree CSS and
> Unicode would solve font selection problems for
> printed pages.
> Excluding mathematics, of course. That has its
> own issues.
and excluding text ... :-)
unicode doesn't solve anything other than providing a character naming
inventory. which is fine and helpful but is not at the heart of what a font
selection scheme is all about.
fonts do not implement unicode, at best they allow the glyphs they contain to
be accessed by unicode names. but they do not contain glyphs for all unicode
chararacters so in reality each of them implements a different encoding which
is a subset of unicode.
as far as the "set of supported gyphs" problem is concerned unicode as such
doesn't solve anything unless you are happy with finding printed question
marks or black blobs in your output whenever you have addressed a character not
available in the current font resource.
in other words, somewhere there has to be a knowledgeable instance that decides
what to do when a current font selection doesn't work for the requested
characters because it is not part of the supported glyph set of that resource
--- you can consider that part of the font selection intelligence and it is
not resolved with a naming standard for characters eg unicode