That is good sign for those with iPhone 4/4S and plan to stay. It shows in the keynote that those who do iPod in their cars can continue to do so with the adapters. Unfortunately, it seems like all the control is/will be on the iOS device vs controlling the library/playback from the accessory.
I called Pioneer on another issue and asked at the end if they had any official news to share. The tech said nothing official. Apple being Apple, the device has not been openly shared with the likes of Pioneer to work on adapting their accessories. Therefore Pioneer will most likely not get their hands on a iP5 until the general public begin to receive theirs. If the device connects and tests generally pass, they will most likely work on supporting the device. If the device connects partially and there are more problems than successes, they will most likely NOT work towards certification of the iP5 with the AR devices.
In my opinion, this is a big fail on Apple's part. Most rooms with projectors are not network enabled. They still have VGA cables plopped in the middle of the table. The same is true with most car stereos. I suppose in 1-2 years we might all be thanking them for eliminating unsightly cables in our vehicles. But for the here and now... it seems like the accessories should have evolved before the connector. But I guess the only way to drive the accessory community into the AirPlay/Wireless approach is to force it.