Why are wireless headphones so rare?


Almost everyone I see using a portable music device is using headphones tethered to the device by a wire connection. I use them too, but the wire is a pain in the butt to say the least and constantly gets tangled. This must happen to others as well and there are wireless headphones out there that aren't outrageously expensive and get at least decent reviews soundwise (I just checked this out). I'm probably going this route but just wondering why the wireless 'phones seem so rare out there? Why do people keep putting up with the hassle of wires? Is it just a lack of knowledge about wireless headphones? Anybody have experience using these products? Thanks for thoughts.
soix
The point was no wire.. Why bother with a battery pack and a wire, when all you needed was the wire to the player?
Well if thats the case, than the other wire to the player can balance things out and give you some extended range. Kind of like if you biwire speakers. It allows you to use 2x the amount of cables without having the negative effects of the extra length.
Back in my day, while walking through waist deep snow 2 miles to school with a hot potato in my hands, we tied a transistor radio to our neck and it was good enough.
When I was a kid we had to plod through neck high snow with ten foot drifts in temps 20 below zero, gale winds, and thitry miles to the unheated one room school through thick underbrush.. fighting off the packs of hungry wolves with only sticks.. singing to ourselves to keep warm. No hot potatos.. Jeez what luxury you had Nonoise..a hot potato..wow.
(8^Q...