Interesting points. However I can see music playback work nicely: a music player in extra-wide landscape orientation would actually be quite similar to the back

Interesting points. However I can see music playback work nicely: a music player in extra-wide landscape orientation would actually be quite similar to the backlit LCD screen of a classic car radio. You just need to way to firmly fix it somewhere in that orientation. I agree that wouldn't really work for navigation, but for music it'd be kinda cool. (note: I'm not actually thinking of buying an iPhone, going to get an Android, though probably not the latest model)