MENLO PARK, California : Meta Platforms on Wednesday launched its first consumer-ready smart glasses with a built-in display, seeking to extend the momentum of its Ray-Ban line, one of the early consumer hits of the artificial intelligence era. CEO Mark Zuckerberg showed off what he called Meta Ray-Ban Display, although some demos of the new technology did not go as planned, with a call to the glasses failing to go through, for instance. "I don't know what to tell you guys," Zuckerberg said. "I