Bluetooth.
Wireless. Allows play/pause button, forward and rewind button. Even transmits song titles to your car stereo. Exists on all PCs, Macs, iOS phones, Android phones, late-model cars, and even some home stereos.
A few people will shout loudly about this jack being gone. Everyone else will get a cheap Bluetooth, wonder why they futzed with a cord this long, remember to charge it every now and then, and otherwise not think about it much.
And that, folks, is why the 3.5mm jack is still the gold standard.
Bluetooth has some compelling use cases. This isn't one of them.
Eg. my car has no problem being the 'headphone' for several different devices.
once that ... thing is nearby it will try to pair with any and all devices in the vicinity, making everything pretty much unusable.
i was really happy with my bluetooth headset until i moved into an apartment in a bigger city. suddenly my devices no longer pair with the headset because other devices, not owned by me, are quicker with their autodiscovery and forced 'add' behaviour.
-more expensive, again bluetooth stack is the size of IPv4 stack
-lossy audio, or again more expensive headphones full of patented crap
->100ms latency
If I go hi-fi route I am sure theres tons of options available anyway. Lots of headphone amps do accept digital input already and headphone amplifier circuitry generally sucks, nexus and iphone being not too bad in this department.
Another thing is, makers should make digital port extra sturdy. MicroUSB and lighting is pretty good at that already IMO.