After reading the posts, I have the following thought:
1. In order to complete with the DSLR, the auto focusing speed of the EVIL must be as fast as the DSLR. So far non of the "mirrorless" can achieve that due to the "live view focusing". That is why Leica sticks to the manual focusing. Experience range finder user can guess the distance and use the " zone focusing " technique and endsup with zero focusing delay. Also all the Leica lenses have about 3/4 turn of the focusing ring for the entire focusing range and depth of field scale. That will definitely help.
2. Overall size is important. Sony has gone over board on minimze the body and ends up with a large lense. Using existing DSLR lens with an adapter is not an answer. That will be too big. Try to compare the f2.0 35mm Aummicro 9 leica) with any F2 35mm dslr lens. The volume is about a factor of 4. So the EVIL needs to have its own set of lens to make the size to be small to lure people from their DSLR.
3. Due to the decrease thickness of the camera body and the will to make smaller lenses, FF in EVIL is almost a dream due to the high cost of the sensor and the special angled and offset micro lens arrangement ( Leica used it on M9, they may be holding patterns on it) plus soft ware adjustment to achieve even explosre from corner to corner. Even APSC will facing similar problem to a lesser degree.
3. Marketing pressure/ user perference. Due to the lower demand, the sales volume of EVIL will be quite a bit smaller than the DSLR. So in order to get the R & D and tooling expense back, the EVIL (body and lenses)will be selling a lot higher than the DSLR at the same performance level. So how many people will buy an EVIL instead of a DSLR???
4. What is the advantange of EVIL over the DSLR beside size??? That is the same reason why the film SLR has literally wiped out the film range finder camera, except Leica. Even Nikon and Canon stopped producing range finder (with interchangeable lens) in the 60's.
5. my personal choice of mirrorless is down to two. 1. Leica M9. It combined the best of classic interchangeable lens range finder and the digital. Too bad at $8000 body only is too steep for me, even I have some Leica lenses from my M4. 2. FujiFilm X100, I look at it as a high tech M9 with a fixed lens.