[diploid]

True but I think if you look at the grassroots movement of open source a different picture emerges. The hacker appeal of printing a kidney is far beyond that of a vacuum. The only reason it hasn't caught on so far with the hardware hackers pushing these printers is because the open source 3d printers are so far away from being able to actually print that.

When the price of open source 3d printers decreases to a couple hundred dollars and their quality has steadily improved for 5-10 years will it matter which cash cows corporations are chasing? In a world where you can just go to your computer and print a kidney for yourself they may just be entirely irrelevant.

disclaimer: if you print yourself a kidney, please get a certified doctor to install it :)

EDIT: watching the ted talk. He's using custom machines, very impressive in-body printing.