So here's the thing. Apple is one of the biggest tech companies in the world today.
For what purpose you ask? I will leave it to Apple to answer that in 7 days. I can assure you of something though, they didn't become as big as they have because they removed connectors just to piss people off and have less functionality. Speculation from people not in the know (us) is pointless.
It's been proven that in that in the past, they have been good about what ports to remove - USB was clearly the future when they removed serial and ADB. The floppy drive was replaced by the CD/DVD drive, which is now being replaced by USB drives and high-speed internet. Better battery tech made removable batteries mostly unneeded.
I hope Tim does have a good reason - in fact, if wireless charging is included, he might be able to spin this as a win for users. But Bluetooth headphones are not inexpensive enough to replace wired for all people, and sound quality is not as good. And carrying an adapter to give you same ability to plug in head phones as the previous model is not a win.