Vudu is adding 1080p downloads and a $200 credit for new customers to its Internet video-on-demand box. Starting October 2, Vudu owners will be able to download a small but growing roster of movie rentals at 1080p resolution--dubbed "HDX" by the set-top maker. The initial 65 titles available include such movies as The Spiderwick Chronicles , Speed Racer , Close Encounters of the Third Kind , Chinatown , Saturday Night Fever , In Bruges , The Chronicles of Riddick , and The Fast and the Furious: Tokyo Drift . The 1080p HDX versions will co-exist with the 720p HD ones, and will be available for the same price ($4 to $6). Going forward, Vudu is planning to make any new movie available in 720p to also be available in 1080p, and the company will backfill update older HD movies in its catalog as well. The catch: ... ...