This week's Question: The U.S. military’s Defense Advanced Research Project Agency (DARPA) unveiled plans last week to develop a "brain modem." The implantable neural interface allows wearers to transmit data from their brains to external digital devices. DARPA's goal is to achieve this communications link in a biocompatible device no larger than one cubic centimeter in size. Applications of the neural interface technology include boosting a soldier’s hearing or vision by providing additional digital auditory or visual information into the brain. What do you think? Will a brain modem become a reality?