The idea is evolutionary rather than revolutionary. Punch! Home Design software allowed users to design and print one-dimensional renderings that could be cut and assembled more than a decade ago. I made a few unimpressive buildings, then gave the software to the kid next door who had a budding interest in architecture and construction. The pics of the 3D printer products suggests the latest technology may have the potential to reduce train sales as propagation of structures diminishes space available on layouts for yards, spurs and even mainlines.
What, me worry?