"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Apple Providing Live Video of Today's iPad and Mac Event on Apple TV
In addition to live streaming on the Apple TV, Apple will also be streaming the event live on its website. In order to watch the stream, users will need to be running Safari on Mac or iOS.
Apple is expected to introduce a number of new products at the event, including the iPad Air 2, the next-generation Retina iPad mini, and new iMacs with at least the 27-inch model sporting a high-resolution Retina display. An update published in error to the company's iPad User Guide for iOS 8 revealed some details about the new iPads which will feature a Touch ID fingerprint sensor. Apple is also expected to preview OS X Yosemite one final time before its official launch, and some rumors have even claimed that the company may announce updated Mac Minis.
Apple's keynote kicks off at 10:00 AM Pacific Time, and MacRumors will also be providing a live blog and live tweets via the MacRumorsLive Twitter account.