an appearance on Oprah is the most coveted promotional opportunity in media. If you are an author(and make her book list)-instant bestseller If you are a singer- one appearance can generate 300K CDs Can't vouch for movies though I'm sure it is as significant. Regarding her power over other people- having met her, she is one of the most powerful, magnetic personalities I have ever encountered. It's all about her being able to focus her attention, her entire being, on whatever is in front of her. Say what you will- she is a remarkable person.