I've enountered a number of discussions lately on what makes an art quilt a successful art quilt. In this relatively new art arena (in the scope of centuries, that is) it is not surprising that there are many different views on this.
Ricky Tims has posted something about the value of workmanship in art quilts on his website that is well worth reading and considering. Check it out here.
My views have tended to evolve. But at the moment, I have reduced the issue to this: a "good" art quilt is one in which the concept, the composition, the techniques, and the materials all work together to convey something. I find myself lately looking at art quilts and thinking, "why is this BETTER because it's in fabric?" In the art quilts I admire most, I find that there is some aspect which is different from what could be done with painting or paper collage or an ink print, and the quilt's imagery wouldn't be the same or as successful if it were not a layered, sewn, fabric piece.
Anyway. Well worth thinking about. Rayna Gillman has also started an interesting discussion, and you can pop into that here.