A room for grandma? Kenneth Dupin, a Methodist pastor in Salem, Virginia, thinks he has a way to address the needs of an aging population: MEDcottage, a portable dwelling that can be placed in a backyard and equipped with technology to monitor a person’s vital signs, filter air and communicate with the outside world. Critics call them “granny pods” and warn that they will create a “not in my backyard” movement (Washington Post, May 6).