No idea here either. Allthough you normally should get the covers displayed just with the cable, one of the benefits BMW themselves highlight about the craddle (both the music and the media version) is cover art.
Btw the cradle charges the phone as well, something you miss with the Apple cable. I'd say it's worth the money. I'll soon be getting a new phone, and from then the old one will stay in the car with an activated twin SIM card (no extra costs other than the card itself).
"Never a boring car"
Some X'es: BMW Z3 2.8, DeTomaso Pantera, Porsche 928s, BMW 732i, BMW 323i, BMW 2002