My goodness, it's the most exciting name for a new Bond film, is it?
Apparently it comes from a short story that Ian Fleming wrote, which of course is why the producers chose it. On the other hand, the short story never had to stand on its own - it was published in a much more excitingly titled collection, and in a popular magazine (Cosmopolitan).
I keep imagining that gravelly American voiceover they always have on movie trailers trying to announce the title dramatically: "Danger... excitement... QUANTUM ... OF SOLACE". Will I be able to keep a straight face? Unless of course the villain is a very nerdy academic physicist in which case it all makes sense!