The 2017 iPhones will not include inductive wireless charging at all. The 2017 iPhones include the RF-based wireless distance charging receiver power management chips from Energous/Dialog Semi. These chips are capable of contact to 15ft charging. This means that all 2017 iPhones are hardware-ready for contact to range charging.
Apple wouldn't have trouble getting an inductive charger out. They'd have trouble getting a never-before-used RF-based charger out. This charger will be a contact-based charger at or near launch, and the true short-range charger will launch at the end of the year. It's named 'HomePod'. It will be capable of 3-5ft charging radius.
The HomePod specifically launches in December in ONLY the US, UK, and Australia for two reasons:
1. December is the absolute end of the year which gives Apple maximal time for Energous to receive FCC approval of the short-range charging technology. Then, subsequent FCC approval of the HomePod which carries this technology. They are confident they can get it out in the next several months, BUT they wanted to ensure they set a sufficiently far out date.
2. The regulatory approvals for the US, UK, and Australia are likely much easier or faster for Energous to deal with and hence the reason why the HomePod only launches in 3 countries.
The HomePod is a speaker. Why in god's name would the HomePod take until December to finish and release in only 3 countries? It's a speaker. My belief is because it's not just a speaker, it's also a short-range wireless distance transmitting device for all 2017 iPhones. However, they will also be capable of contact-based charging from a separate, much cheaper accessory sold at launch.
If Apple does this, the HomePod will sell in absolutely absurd numbers and they will easily be a trillion dollar company.