I have a few hopes for Mesh clothing.
First, I'm loving the fact that, although I have to edit my shape a bit, I can wear clothes that stretch across the breasts as opposed to look like they're painted on them. This could look exceptionally good for period gowns that typically are worn over corsets (ie Baroque and Victorian gowns).
Also, I'm hoping (though have yet to see any) that large mesh gowns like mid-Victorian era hoop skirted gowns look great with mesh. Some designers are good about the flexiprims in their gowns, but I find that most designers have too much 'flow' in the gowns, so that when you're walking it looks like they're moving through water.