Flew on B787-9 A7-BHK last night, on it's 4th day of commercial operations. Despite earlier suggestions the later deliveries would have changes, I didn't notice any significant differences between the seats on that and the earlier QR B789s I've flown.

They did advertise the ability to connect your own bluetooth headphones, which I hadn't seen advertised previously, so this may be one of the "enhancements".