Here is another small example of how the powerful and flexible Convergent Modelling in NX 11, (the only software to offer this ability to work with Facet, Surface and Solid geometry in one environment) and 3D printing enables complex shapes to be designed and manufactured.
Many modern designs that are developed with newer design concepts such as lattice features, or via topology optimised facet geometry as is the case in this demo would be impossible to manufacture with traditional manufacturing techniques. NX 11 ability to connect directly to a 3D printer when the OS is Windows 8.1 or higher lets the designer print parts directly from NX.
In addition to what Paul said, Convergent Modeling also makes it a lot easier to add things like supports to scanned-in data. As you know, supports are often needed when 3D printing solid models.