Durable, large, high resolution, and cheap have all be done, just not at the same time. As with any technology I think it will only be a matter of time, though.

Personally I do wish there were more options for metal and ceramic, which would make it very useful for custom, wacky eating utensils that could not be done with traditional manufacturing easily. Ponoko does it but it's not cheap and they have a limited selection of colours.