... Or not to be necessary ... it's not really a question.
Just when you think there are no separate products left to fuse into one, I walk into a Duane Reade and find earTunes, a hat with built in head phones.
When a winter hat and iPod earbuds are just too much, simply plug your portable player up to your tobaggan, and you can listen to music and keep your head warm at the same time.
I used to be cynical about the fusion of cameras and cell phones, but look at me now. Perhaps one day I'll wonder how I ever got by without my earTunes.