The most interesting part isn't that they chopped up the musical themes to produce complete symphony pieces, but that they did it in reverse. They started with determine which musical themes were important enough to cover in a symphonic setting, then chopped all of the movies up to complement the thematic flourishes.

Not to mention, after editing the movies down to work with the music (the PBS coverage showed a segment that flashed from a scene in TPM to a scene in ESB to a scene in AOTC for Anakin's fight music from ROTS), there's the added difficulty of pairing up a live orchestra with pre-determined video segments.

All of the video work was timed to flow with the accents and dynamics of the music, so the conductor is not just following a score, but essentially also a red bouncing ball of a metronome on his video screen, overlaid with the score and the video work being shown. Talk about multi-tasking. There's less flexibility for the conductor (and Mr. Daniels!) to take artistic license, so it is exceptionally impressive from a musical-theater nerd perspective.

Also, Star Wars on the jumbo-tron FTW.