One use that occurs to me (though it opens a legal basket of worms) is amateur filmmaking. People love to write fan fiction; deepfakes can open the door to visual fan fiction in movie or TV form on a level that's not really possible right now.
A more legitimate one would be for videoconferencing -- if you fake yourself in the best possible shape (say, after some weight loss, plus makeup, plus great hair style, plus wardrobe), you can ALWAYS put your best visual foot forward without the hassle/money. So you could be sitting there bloated after eating a bunch of tacos but in a videoconference, look your best.
Similarly, it could be great for film productions: prepare a library of photos in proper makeup/prosthetics, then deepfake the actual footage, allowing the actor to work normally without the time and money spent redoing them every day.
A more legitimate one would be for videoconferencing -- if you fake yourself in the best possible shape (say, after some weight loss, plus makeup, plus great hair style, plus wardrobe), you can ALWAYS put your best visual foot forward without the hassle/money. So you could be sitting there bloated after eating a bunch of tacos but in a videoconference, look your best.
Similarly, it could be great for film productions: prepare a library of photos in proper makeup/prosthetics, then deepfake the actual footage, allowing the actor to work normally without the time and money spent redoing them every day.