Are there still innovation to be done in high-end headphones? Seems to me like the HD60X still stands up as one of the best headphones aviable to buy. I do wonder if there is still innovation to be done in the higher-end headphone segment, since Sennheiser and other brands seem to rely on sales form headphones released several years ago. 

Or will we just se wireless versions of high-end headphones since there is not much more to do in terms of sound quality?