I get info about what's going on through a couple of 3D printer online zines:
http://3dprintingindustry.com/
http://www.3dprinterworld.com/
Plus I scan Hackaday: http://hackaday.com/
Gizmag: http://www.gizmag.com/
Wired: http://www.wired.com/
and a few other sources, every morning.
What I see is that this technology is being used to advance whole industries; manufacturing in plastic, metal, biological, food (sugar, chocolate, pizza...), construction.
It has a hardware aspect, mechanical engineers are designing and printing new printer parts almost as if it is a race.
It has a long software tail; CAD, Slicer, controller, and also display, service, and collaboration websites.
The electronics are fairly simple, which inspires people to tinker with them and add more sensors, motors, displays, inputs, etc.
So you get the Moore's Law affect from 3 or 4 directions. They multiply.
But the real key is the open source nature of it all. There are thousands of people working on this, most of them doing it for free, some for contest prizes, and some are earning a lot of money because the government is throwing money at 'innovation'.
For Moore's Law in the semiconductor world, all that was needed was a few hundred engineers, keeping secrets from each other, earning a paycheck. No love, no fame, no glory.