"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Satellite Broadcast of Apple Event
The April 28th Event was reported last week and said to have announcements "that will be music to your ears".
It is widely expected that the long-rumored iPod upgrades as well as an Apple-branded Music Download Service will be released at this time.
In other news, it's rumored that a "communicating device" will be released in the coming weeks, possibly alongside the April 28th announcements.
One reader notes that all Apple Store employees are required to be at work on May 2nd, for training on a new product.