I understand your reaction on this choral symphony, Mythodea by Vangelis. I have mixed feelings about it myself.
It sounds a little bit like a duet from the opera that is in commercial (is it Delibes or Massenet, I can never remember) in parta one
http://youtube.com/watch?v=xRtTJkgvTnc&mode=related&search= Also I used to look down on music for movies. What is music for movies, but good or sometimes not so good music.
It is some kind of spectacle. I don't like people singing in a microphone, but they use kind of magnification in big halls (install microphones somewhere). I didn'lt like the use of electric keyboard (I happen not to like the sound), but this is a new instrument now.
On the other hand it is a kind of choral opera and even has visual effects etc. May be Liszt, Wagner or even Mahler would look nicely on such a development. May be even Richard Strauss would take a notice.