well, it goes on sale in mid december, right? that's like, almost 2017.
Most of its sales are definitely going to happen in 2017, one would assume
that wouldn't have changed the current situation, though.
The iPhone can't connect to the macbook because of the USB-C that connects to the wall plug.
Even if the iPhone had a USB-C on the bottom, the charger still wouldn't be able to connect to the macbook pro because it's USB-A on the side that goes into the device where the power comes from.
Respectively, even if they stuck with lightning, they could just ship a cable / wall wart that replaces the USB-A plug (on the cable) and USB-A port (on the wall plug).
Adding USB-C to the iPhone would have not removed any of the current connectivity issues apart from:
* people being able to use the same pair of wired(!) headphones sans adapter on their macbook pro (2016) and their (hypothetical USB-C) iPhone 7 (or with the
same adapter at least, because i'm not sure there will be many USB-C headphones
* people being able to use the same adapter they use to go from USB-C -> HDMI on their macbook and their phone
USB-C still needs a dongle to do many things (output to a TV or projector, connect most external audio devices like DACs, midi controllers and microphones), you'd just have the same dongles for your mobile device as well as your laptop, i guess.