Cut those wires!
The new project has landed on Kickstarter that seeks to turn compatible headphones that use wires normally into Bluetooth wireless headphones. The product is called Flow and is designed to work with the Beats Solo and Studio headphones in addition to the Bose Quiet Comfort headphones. I would imagine any headphones that have a removable cable with a 3.5 mm headphone jack would work with this device.
The Bluetooth receiver connects to the headphones and has a 30-foot wireless range and dual noise cancelling microphones. The outside of the Flow has capacitive touch sensors for controlling volume and track. The internal battery claims 12 hours of run time. The pledge of $90 will get you one Flow device.