Any engineering shop that's prototyping and possible creating production products. I got to see the prints first hand, pretty solid stuff. Sadly they hadn't printed a T-800 terminator yet, but give it time. Skynet is alive!
Would their be a market to be a middle man that owns the printer and does the work to coordinate low volume runs from shops that need some prints, but not enough for full volume or enough to own/maintain the printer?