"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Tim Cook Speaking at Goldman Sachs Conference Today, Apple Providing Live Audio Stream
Cook is not likely to make product announcements during today's session, but previous conferences have seen him divulging details on Apple's philosophies and business practices. In 2013, for example, he spoke about Apple's cash usage, innovation, design choices, retail strategy, iPhone growth, and more.
Streaming audio of the Goldman Sachs conference will be available beginning at 12:30, and MacRumors will also provide highlights and coverage on what Cook has to share this year.