I don't know why I feel the need to post it here, but the folks (idiots) over on DVICE seem to think this chip is meant to prevent 3rd parties from making the cable. That the chip is an authentication device. I tried to post a link to this article in the comments to show that the chip is in fact necessary to accommodate dynamic pin reassignment It was initially posted but 30 mins later my entire post was deleted. Gotta love the lack of fact checking and lack of admitting that they are wrong on tech blogs these days. MacRumors is one of the few good ones left.
On a side note, I was happy to discover that my Alpine head unit doesn't need the 30-pin adapter. It has a female USB cable that used a 30-pin to USB sync cable to run my old phone. I just popped the new lightning cable into the USB and it work just as well. If anyone has a car kit that is nothing more than a non-apple sync cable into a USB port, try the new cable first before ordering the 30 dollar adapter. You might be able save a few buck. I assume the real use for the adapter is all those docks with fixed 30-pin plugs.