"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
AirPods and AirPower: Everything We Know
Resellers Getting Signals for a Wide Range of Apple Updates?
It appears, however, that Apple could be prepping for a wide range of product updates, with signals to at least some resellers to halt resupplies of Mac minis, MacBook Pros, iPods and even Cinema Displays.
Unfortunately, reseller signals can be misleading and could simply represent temporary supply shortages. Best Buy, for example, had shortages of MacBooks towards the end of July.
Our buyer's guide does show that many of Apple's products are due for revision.