Given the fact that Leica and electronics do not match and have never matched to be realistic, I would not want to bet on the S2. I wonder who this camera is aimed at. Probably snobs who like it because it has "Leica" on it. I can't imagine any professionals since they use either Nikon or Canon ff camera's that are cheaper, offer excellent quality, have more and cheaper lenses in the line-up, have probably a faster AF should you need it, or they use Hasselblad (or Leaf) digital systems. Sure, the same price or more expensive (at least the digital back) but more versatile, a bigger sensor, cheaper lenses (again).
Leica should have put their efforts in a good and affordable digital M. I am still hoping for a Nikon rangefinder...