The list is also padded pretty heavily. In reality, something has a killer app or it doesn't. 3D printing's weaknesses in speed and materials don't seem likel

The list is also padded pretty heavily. In reality, something has a killer app or it doesn't. 3D printing's weaknesses in speed and materials don't seem likely to go away any time soon, and in fact they seem intertwined in a way—faster printing would seem to require ever more specialized materials. It's obviously an exciting technology that will carve out a few niches, but I don't see what all the hype is about.