A personal desktop gem-gum factory that is in the process of extruding out some product. (Screencap collage of from concept video "Productive nanosystems")
The personal gem gum factory is:
Your personal device that can push out virtually every thing* of your daily use. (* at least every inedible thing)
The personal gem gum factory makes:
Your products that are as cheap as the abundant mining-free raw materials that it processes.
Your products that are far superior to today's best and ridiculously expensive high tech products.
Your products potentially in an environmentally friendly effluent free way (also advanced recycling is faster than producing from scratch)