Eventually, not this month, maybe not this year, but eventually,
we'll move to XHTML. At that point which skin a webpage uses will
really only need to affect the actual HTML output at one point:
choosing which CSS style sheet is used. The rest of the changes
will be in that style sheet. (At least in theory; I bet the theory falls
a little short of reality, as always.)
Most of the other display-related templates at that point just fall
back to the default. We'll get a handful of templates that get
defined for each skin type and that get written into include files by
freshenup.pl, but apart from that, 99% of the other templates need
be defined only for the 'default' skin.
So it is silly to add an entire new category to template names just
for 'skin'? I don't think so; it does add a lot of flexibility, and
certainly we'll need them up until the move to XHTML.