I've been holding off because the desktop size limits functionality, but manufacturers seem to be moving beyond toys. I think we're right on the cusp of seeing some industrial strength printers geared towards hackers/makers/hobbiests. This one on KickStarter seems to be pushing the conventional size boundaries, http://www.kickstarter.com/projects/re3d/gigabot-3d-printing....
This is brilliant, but now it's only a matter of time until it's in actual use. Sort of like how evercookie was a clever hack meant to call attention to privacy concerns, then was put into actual production sites.