I'm sure if he was offered the right role he could be convinced eventually. He's a shrewd guy though. Music's doing well for him right now, so why jeopardise that by rushing into film?
I think I remember him saying he wanted to play Bond at some point, and that is why he did the song 'Millennium', coz it would be the closest he would get.
I can just see James Bond with full sleeve tattoos. Then again, Bond is a Royal Navy commander, so it's not that much of a stretch. Well... yeah, it is.