"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Griffin Introduces BreakSafe Magnetic USB-C Power Cable for 12-Inch MacBook
BreakSafe has a patented quick-release magnetic connector that plugs into the Retina MacBook and safely disconnects from the rest of the cable when put under stress or strain -- for example, if someone trips over the power cord. The 12.8mm connector is small enough that it can be left in the USB-C port without using much space.
The Nashville-based accessory maker also unveiled a wider range of USB-C adapters and three-foot cables, including a USB-C to USB-A adapter ($19.99), USB-C to USB-A cable ($19.99), USB-C to Micro USB cable and USB-C to USB-C cable ($29.99). The adapters and cables are available now through Griffin's website.
Last, Griffin’s iMic USB-C audio interface will be available for $49.99 in Q2 2016.