To see what the future of film distribution might look like, go to a website called ZML.com. It offers 1,700 films for download to personal computers, iPods or other hand-held devices, or to burn to DVD. It is inviting and easy to use, with detailed descriptions of each movie, editors’ picks, customer reviews and screen stills. And the prices are reasonable: “Atonement”, for instance, costs $2.99.