3D print bureaus are not viable long term because they are a service market in an arena of shifting technology. The best thing they can do is sell the novelty of 3d printing that will eventually wear off. Without a product line of their own, they have a hard time establishing / distinguishing brand identity.

The money is going to be made by the first artists and designers who only print their own products instead of outsourcing. A small shop with big technology making products that no one else has rights to make has no competition. In this rare instance, the technology is feeding the development of the small art studio-turned-production-facility, while the 'big guys' struggle to sell more printers.

At a certain point, I am willing to toss the whole industry away and keep the technology as a vehicle for pioneering my own ideas. I could really care less about how a certain 3d printer manufacturer performs, as long as someone stays around to make a quality machine