Why is it only for the 3rd world? Wouldn't something like this be useful for all hospitals, all over? I can think of this being used so that mothers with pre-ma

Why is it only for the 3rd world? Wouldn't something like this be useful for all hospitals, all over? I can think of this being used so that mothers with pre-mature babies can keep the baby at their home instead of paying huge hospital fees, esp. in US.