I am not sure, noise cancelling or wireless come to mind or maybe how Sony managed to make a 70mm driver sound good in the MA900.
Anyway , whats your take?
I would say the newer ortho drivers or maybe the idea of decentralized drivers. Actually, I'm not sure if decentralized drivers are newer or if they were used a while back too
As for IEM's, balanced armatures are probably the best advancement but again, I'm not sure if they fit within the 10 year time span.
Not really an innovation but i greatly enjoy that more and more companies get serious about releasing higher quality headphones. The market was almost empty 10 years ago if you compare it to the endless number of headphones avaible today. Now we have so much choice, it's amazing.
"Innovation" I don't know. Uncompressed audio via wireless is very very impressive indeed. And I would agree on the ring radiator in hd 800. But my vote would have to go to the recent updates to DAC's. Getting a true balance standalone dac with two AKM4399 32-bit D/A converters is now affordable. The woo audio wa7 comes standard with a TI PCM5102A 32-bit DAC chip. This is very nice progress. (Not really a innovation) Also portable tube amps that sound wonderful! Whats not not love about that ;)