"Hey Siri" support and possibly wireless charging case alongside AirPower charging mat.
Apple Offering $50 Off Apple Watch With Any iPhone Purchase in Select Apple Stores
The promotion is available at participating Apple Store locations in California and Massachusetts, including Burlingame, Chestnut Street, Corte Madera, Hillsdale, San Francisco and Stonestown in the Bay Area, and Boylston Street, Burlington, CambridgeSide and Chestnut Hill in the Boston metro area.
Apple confirmed that the promotion runs from October 30 through November 15, 2015, and is not available online. The deal does not require purchasing AppleCare+ or other accessories and add-ons. The offer is only valid when the qualifying iPhone and Apple Watch are purchased together on one transaction.