It has been shown by a number of studies that children who are rocked and carried on their mothers'
bodies develop better brains, and one study by Dr. Mary Neal has shown that preborn babies in
incubators which are moved/rocked develop better than babies that are not rocked. This has to do
with the fact that babies have an
instinct that makes them feel uncomfortable when they're not with
their mothers (and comfortable when they're with her). Rocking/moving/carrying is a sure indication for
them that they are protected, and so they feel good. Babies that constantly feel uncomfortable
develop sometimes serious
brain damage. See http://www.violence.de for more info. The positive effects of rocking remain even in old age, which is why rocking chairs are so popular (and one study by nurse Dr. Nancy Watson has even found that old people who use them are healthier and happier).
However, in spite of the obvious benefits of auto-moving incubators, preborn babies are usually placed
on still mattresses. Auto-moving incubators would be a quick and easy solution for this problem.