Exactly. Right now you have to be a tinkerer to want to do this. You have to assemble the printer, tweak it, learn the software, make a model, tweak it, and so iterate. Your average user who can barely check his email is not going to be able to do this. I give it 5-10 years before simplified software and cheaper printers allow these to show up in non-geek homes.

And if I had the cash, I'd have bought a Makerbot already.