Once 3d printers become user friendly and the big megacorps start offering encrypted downloads of their files so you can easily print your own repairs for home 'things'.
I like designing my own, but the general public won't do that :-)

THEN, you'll see a major move into the file distribution market.
My money's on google. They're more prepared to throw hideous amounts of money at already proven companies and buy them up.
Yeah i think they're funded direct from hell. But compared to apple and microsoft they're positively saintly.

I'm hoping that the world will one day wake up and abandon apple to the wastelands that they deserve. But for some reason people think white and expensive is the same as well designed and value for money. Weird, but true.

But like I said, at the moment there's no money in the home printer market. And no market for home printable files.
There will be and it won't be long.

The model-t is the first stab at a consumer friendly printer and file service.
Couple that with the machine that removes it's own prints to allow unattended print queuing and you're a long way towards the machine that will eventually be as ubiquitous in people's homes as the microwave, television or kettle (in the uk anyway).
And then you'll see companies lining up to print money :-)