Where's the flash? Nothing said for an external flash mount or controller...I'm still not convinced for a number of reasons. Primarily function control. Another one of the reasons DSLR bodies are so "big" is that they place many of the functions on dedicated switches, dials, and buttons. While you can build some of that functionality in menus, it becomes almost worthless. You'll miss the shot. I love having everything at my fingertips, and you just can't duplicate that in a smaller body.
The article...and others...make some pretty bold statements about what market this is aimed at.
"Unless you have a specific use that these cameras can’t meet, or you need the very highest level of performance only a Canon 1D or Nikon D3 can bring, you have no reason to buy a DSLR."
I think this might work for the millions that have purchased and entry level DSLR, or even a semi pro body in the hopes that they would now "take amazing pictures" Most are not interested in putting in the time to really learn the functionality and science behind photography. A lot were just looking for "blurry background effects." They bought a big point and shoot, leave it in Auto all the time, still don't get the amazing pics they thought they would 100% of the time...and complain about the body size. And I think that's your market. Sony and others have certainly lost a lot of market share with the DSLR craze...and they'll try and convince them THIS is what you need to get "amazing pictures."
Also, I can see if all I shot with was my 50 1.4...that this would now be more pocket friendly, but that's just one of the lenses in the bag...used for certain situations. The size difference of one of these mounted to a 70-200 or 14-24 is laughable for what you'd be giving up. The argument is even negligible for most entry level zoom lenses. You're not going to fit an 18-200 with one of these in your pocket. And for $900? To me, it still makes more sense to just carry a cheap PaS if I'm not interested in photographing anything to be kept long term.
There are a number of reasons that point and shoot have never hit the mark for those seriously interested in photography, and frankly I don't know of any semi-pro or pro that is complaining about body size.
My $.02