I would like to see automakers and their electronics suppliers join with the MP3 makers and the Bluetooth consortium to develop a standardized automotive interface for personal MP3 players.
I want to be able to get into my car, power up my MP3 player, and have it look like a CD changer to my radio, without needing wires or expensive adapters. I want the MP3 player to stream music to my radio digitally, so that sound quality is preserved, without the static that comes with an FM modulator. The MP3 ID tags should be displayed on the radio as if I was playing an MP3 disc, and I should be able to navigate by folders, songs, artists, etc. Playlists should be supported.
I think that people would be willing to pay little extra for that kind of convenience--I know that I would.
(Steve Jobs is missing the point, when he says people wouldn't want a bluetooth enabled iPod. It wouldn't be for wireless headphones, it would be for streaming your music!)