I find lately that my work has ceased being 'art quilts'. For one thing, it seldom has three layers, unless you count the layer of applique on top of the top layer...for another, it's starting to include fibers that aren't really fabric.
For instance, I'm working (although it feels like playing) on a piece that starts on a failed monotype on paper. Failed in the sense that it was a messy pull off the plate, and it just didn't work on its own. To it I've already added some silk and some metal foiling. After I had stitched across the paper--wonder if it dulls needles like it dulls scissors. Probably. But it's become a little piece of art.
My work does better in art shows than in quilt shows, maybe because I've strayed too far from quilt rules--I actually like uneven, big stitches. But that's ok with me I think.
I'm busy working on getting ready for a big solo show in February (in Jacksonville, Illinois, more details later), and I find the freedom of being able to frame or not frame a piece, to include an oddball material like window screening or twigs is a good thing.
So my definition of 'fiber art' is expanding. A picture of the first piece is below....percentage wise, it's around 10% fabric. But paper is fiber. So it's somewhere between fiber art and mixed media and the only time I have to define it is if I enter it in a show with categories.