Concerns have been multiplying in the U.S. over the creaks of a medical infrastructure that’s bearing the weight of an aging population. Current and upcoming members of the over-65 club are helping to drive a new age in healthcare, in which devices connect patients with caregivers, things get even smarter, and machines get even better at learning what sensors are saying. The swelling over-65 segment of the population, which accounts for about 63 percent of the U.S.’ long-term healthcare services, is driving demand for new healthcare tech.