Well, very interesting. I agree with PaulR that's there's no definitive answer to the lack of themes question, and whether or not themes work often depends on the orchestration around them. An example that comes to mind is the opening melody of Barber's "Summer in Knoxville, 1915." There's four bars of one note, yet it works beautifully because of the moving chords underneath. John Barry's themes are often quite simple ("Midnight Cowboy") but often, not always, haunting and memorable, and very much his own.
Since composers are going to use the tools available, it's no surprise that synth styles and sounds are taking the place of traditional instruments. Blending the two is a skill in and of itself. I think in Hetoryn's podcast interview with Jerry Goldsmith's son he mentions that his father was really intrigued by the synth possibilities, although I also remember Goldsmith senior lamenting the lack of musical training in some of the younger film score composers.
Not to bring up that lightning rod figure again, but I do believe blending orchestral and electronic instruments is one of Hans Z's strengths. Like him or not, he does have a sound, and almost every new soundtrack he does has some new sounds or mixtures thereof. I sort of agree with you guys who didn't like Inception, but some of the sounds he comes up with are quite inventive, and in my opinion save the CD.
Thanks, Guys.
Cheers, Tom
PS. One of my favorite Jerry Goldsmith scores is "The Medicine Man," starring Sean Connery and Lauraine Braicco (of "The Sopranos" fame.) Great themes. Every film producer who goes with "Various Artists" for a soundtrack should be forced to watch this film and see how a good score can buoy a movie.