I've had a lot of printers in my life from letter quality daisy wheels to dot matrix to dye sub to laser. and at some level the businesses I ran wouldn't have been possible without the leveraged use I got from printing without limits. Tom pointing that this same thing is right here with 3D printing is telling.
1) it's ground zero. think of Makerbot as a Epson MX-80 2) there potential for hundreds of new business 3) be prepared to see lots of failure as it engages 4) plastics and resins are toxic. stand by for regulation in California.
the discussion last night over dinner before the show was about lots of different things but one subject was "I want one but I don't know why I want one." this was Kanen answering the question do you want a 3D printer because making 2 is just as easy as making 1.