I watched a friend struggle with a premature birth. The baby was born at 26 weeks, just barely past the point of viability. She's very lucky that her child is totally healthy, but it was a long struggle. This kind of technology could save a lot of suffering, and maybe even a lot of effort and expense. Her child needed constant monitoring and interventions to develop somewhat normally. It would have been terrific to be able to put him back into a plastic womb and finish developing that way.