No camera answers every wish, but this camera will have to be taken seriously.
It's tiny, its capture-quality will likely blow away our Ricohs, detail-wise, and its auto-focus (and manual focus wheel) will make it a strong contender against the M8 with a 35mm lens, where shot to shot sharpness is a priority. I wish it looked less like a slick p&s and more like the Ricohs, with an ergonomics-biased design, but the release of this camera is a very good development and we should all be cheering it on.
I commend Sigma for attempting to lay down the gauntlet. Not so long from now, there will be an array of comparably spec'd cameras from competing manufacturers and we'll all benefit.
Cheers