I haven't seen anything lately but then again, I'm not "keeping current" or getting any magazines.
Haven't been in years (decades?) but we used to have regular modern quilt shows here in Seattle, and I have seen various ideas of space/definitions of quilt..
Mostly I know "negative space" as a term for the large backgrounds used in some modern quilts, I have one planed for metallic cat fabrics (Cattitude by Benartex of course) minimalist blocks and piecing and lots and lots and lots of black.