With rapidly advancing DNA technology, it seems to be the way we are heading for good or bad.
Of course, as you imply, it depends on how we use it like any other scientific advance. If we use DNA testing to "weed" out unborn children with genetic deficiencies, we are as evil as were to Nazis. However, if we use genetic research to correct genetic defects, which is the subject of much research, I can't see anything but good. Science doesn't make the moral choices, we do.
Of great concern just now is the tendency to see life on a cost benefit basis. Not many of us old folks could justify the expense of our medicines against the goods and services we produce. Is it economically justified to keep Grandma alive when all she does is sit there and knit? Such questions are being asked, particularly in European socialized medicine environments.
Of course, abortion on demand is an ongoing holocaust.