Vivitouch headphones: a 4D experience?

We just came across Vivitouch headphones, which claim to provide a 4D sound experience.  With the use of vibration technology, which includes electroactive polymer motors, the user can have the body numbing intensity of a booming subwoofer without turning up the volume to an ear damaging level. Vivitouch will be releasing the headphones soon, and we're really interested to see what the public thinks. Check out the Vivitouch headphones website: here