I would assume that the covers would be cached and therefore if we find out how and where they are cached we could simply preload the pics or else just have them load when you have a wifi connection.
But it's just an odd text to use. If I load up audio files from my iPod, chances are they have artwork -- unless they mean they have a service to fetch artwork for audio files that may not have it?
I liked this latest edition of Inside Tesla... What vin number was the white shell in the video? And will it be one of the demo car for the "Amped Up" tour?