I don't see this as full 3d printing either, it's digitally controlling an old manufacturing technique.

There are some efforts going on in 3d printing fabrics though, so it will be a possibility in the hopefully not-so-far future. Such as this one where they're looking for solutions to incorporate cotton fibers into the 3d printing process.
https://www.innocentive.com/ar/challenge/9933198

I think it would be especially valuable if the 3d printer could coat the yarns/fibers before printing them out. That way you can make fabrics with different properties at different locations, such as flexible vs rigid, breathable vs. insulating/waterproof, selectively glueing fibers together for reinforcement, different colors, etc.

Another development I've heard about is 3d bioprinting of cells that can be used as an alternative to leather.