Making one's own clothes easily is the holy-grail of fashion. Your complete vision, personality, creativity all in a fashion statement. I am always happy to see art and technology merge. I look forward to 3D printing a shirt.
I would actually be surprised if we ever see 3D printed clothes used in conjunction with "fashion" in any major way. To me, fashion means high cost. But 3D printing is the modern day counterpart of clothes made on the home sewing machine. When I was growing up, the kids who had home-sewn clothes were always embarrassed because they weren't very fashionable.