Sony MDR-1000X ($399)
The insanely rapid growth of smartphones is beginning to level off to a comparatively sedate 6% compound annual growth rate (CAGR). That's what happens when virtually everyone is already staring into their palms...the market is pretty saturated. That's good news for us headphone geeks because now that everyone has their phone they can start lusting the next worthwhile gadget, and that turns out to be wireless headphones.
Graph from this Slice Intelligence article.
For the first time last year,…