Of-course this is great and everything... but how the hell it was shot so many great movies before all the compositing technique became so affordable ... Movie directors should rely more on working with actors, then on post production. Obviously this is a great technique that will save your scene if it's not the way you wanted, but as a director, I don't want to shoot a scene with the idea that I will fine-tune it in the post, as rather make it happen on the set.
Of-course, who am I to say about the director's job. Probably that's why everyone knows David Fincher, and no one me ))
RE:Vision Effects also have good plug-ins for vfx.