This whole idea of playing a film like a musical instrument is going to get one step closer to reality with the release of Rock Band, a new game from the brains behind Frequency, Amplitude and Guitar Hero.
The process by which Harmonix, the developer, secures original session tapes and converts them to a real-time playback format is very similar to my idea of how the film RIG.
http://www.wired.com/gaming/gamingreviews/magazine/15-10/mf_harmonix_sb
Still, we're not playing with Bowie classics, we're trying to make a new work of our own. That's the real hard part.
http://en.wikipedia.org/wiki/Rock_Band_(video_game)