There used to be three main options for aging Americans: move in with family (and lose independence), enter a nursing home when family could no longer provide care, or stay in your own home with all its risks and inconveniences, for the sake of remaining independent.
Those choices have broadened. Whether it's assisted living, independent living, continuing care retirement facilities, or nursing homes, the growing gray market is driving a new segment of housing, kind of a cross between health care and hospitality. "Choice without worry" could be its motto. Comfort, efficiency, and good IAQ are its parameters.