I'd bet money the next iPad has no headphone jack. And it wouldn't surprise me the new MacBooks likely being announced next month omit it as well. The only reason they might keep it on the MacBooks is it doesn't make a lot of sense to introduce a Lightning jack on the MacBook only for headphones. (But not everything Apple does makes sense.)
If removing the jack actually led to some kind of innovation, that would be something else. But in this case it doesn't. Leaving the jack in the design does nothing to facilitate the ability to use Lightning headphones or improved wireless. It just saves a very small amount of space.
The only way to see the move to force either Lightning or wireless headphones as anything but a ploy for Apple to be able to sell a chip to go into every set of headphones requires you turn up the Apple Reality Distortion Field to full power.
Also, if Apple was really interested in moving the industry forward, it would have been with a solution that didn't involve a proprietary Apple connector/chip that competitors could also utilize.