AirPods 4 get spatial audio and noise cancellation
But the AirPods Pro are getting a big hearing aid update (in the US).

Hot off a wild few hours of liveblogging the event, I'm trying to now write up all the news from Apple's Glowtime showcase.
On the headphones front, the biggest news was the arrival of the 4th gen AirPods. Apple has tweaked the design a bit to improve the fit for more people, while adding in spatial audio and ANC for the first time.
Previously, both of these features were limited to the AirPods Pro and AirPods Max, so it's interesting to see the tech roll down to the entry level AirPods.