Animal livers have been created in the lab using this process before, but it was never clear if researchers could do the same with human cells. Now that they've demonstrated the ability, the next step will be to get one into a living animal and see how it functions. Then, ostensibly, they'll try to grow larger, more complex organs equivalent to full-grown human organs. As such, the era of made-to-order livers is still a ways off. But this important step forward for bio-engineering could contribute not only to lab-grown livers, but also to other engineered tissues that are in short supply, like kidneys or pancreases.