As for the comment that color should be interspersed by CGI into the B&W PTS, I do like that idea, but I'm certain EON would never go for it, as they will want to avoid demolishing the suspension of disbelief. Sin City KNEW it was a comic come to life, and the splashes of color only intensified the comic-book sensibility.
On the other hand, the insertion of color in Schindler's List, drove home the drama and was an unsubtle message from Spielberg about the Nazi atrocities. But even then, this kind of intentional highlighting would not work in a Bond film.
It would be received with the same groans as seeing an invisible car and glacier parasurfing...
I disagree. From what we see in the trailer, the black and white with the red being the first color we see looks wonderful and I think it will be an "Oh cool!" moment with audiences.