Honestly I don't know what you were expecting.

Sound has not changed in the last billion years so I wouldn't expect any updates there.

Transducer technology has not seen any major updates - the market is much smaller than it used to be anyway. Headphones is a really tiny part of that market. And all the technology updates in the headphone world have really been aimed at convenience (Bluetooth, charging etc) and playing with the sound via DSP since consumer headphones are virtually all self-powered now.

And "better" sound is a subjective term - what were you expecting? There were already headphones which could reproduce a recording in such a way that your ear could not discern it from the real instrument so what else would have been delivered?

I don't see new headphones as breaking new ground using the latest technology anyway.