"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Nano To Reach 12 GB By Fall?
Gartner forecasts that a 16Gb (2GB) device will be available in the third quarter for about $30, down from its current price of about $35. Due to Apple's procurement power and investment, it is conceivable that it could get pricing for a device at $25 or even $20. This pricing would enable capacities of 12GB, leaving enough room for the remaining component and manufacturing costs as well as Apple's margin, while still reaching a $250 price point.
A recent rumor stated that Apple has been stocking up on NAND flash memory, presumably for iPods. The current highest-capacity iPod Nano is 4 GB.