Fox's executive VP of Global Research and Technology Strategy Danny Kaye was hopeful Apple and Disney would both use the new UltraViolet media locker copy protection system. He noted in an interview that all but Disney among the studios had signed on, and that just that it was holding out "doesn't mean that [Disney] won't." He was also convinced in speaking to Pocket-lint that Apple was going to sign onboard and that it was just being conservative before leaping in.
