[jarek]

At 1D X's price range, all flash use is strictly on purpose - no one would have used flash on a 1D because it's too dark, it's all for the effects it enables with bouncing and gels and all sorts of expensive gadgetry.

The technology filtering down to consumer level in a couple of years is pretty exciting, though as elithrar noted, the exposure is going to be difficult as it's hard to tell between "dark area you want to see" and "dark area that's the background".