One day, people with Alzheimer's disease could have telephones that show them a picture of the caller and remind them who it is and when they last talked.

They might walk across a Floor with sensors that check their gait and sound an alarm if they fall. Others might relax on a bed that monitors their pulse and breathing.

New technologies for seniors, supplementing conveniences like The Clapper and emergency warnings like Life Alert, are on display this week at the White House Conference on Aging.