I agree on the facade pieces, but I'll just put up another example from their website of a wall they made that really creatively shows off the 3D printed nature rather than hiding it.

Now granted, it's not impossible to make that wall with traditional concrete molds, but it would have been much more time consuming and expensive. With the printer making the panels, they could vary the pattern, even making it into a continuous mural if they wanted to. Some of the pictures also show printed wall panels that look like they're filled with some kind of spray-in foam used either as a removable support or as insulation.