I think there already is the perfect DSLR "killer" - you can already buy it -itīs name is Sony RX-1
just try a comparison between RX1-LeicaM9-FujiX100 and Fuji XPro1
I think that says about anything.
Oh dear, I hope you not mere compare those crops for resolution and pixels??? Something very key in my OP was about the lenses and how they make the image look photographically, not at all pixel peeping. My example was to look at standard ~50mm equivalent lenses, that are relatively simple to design. All of us have of course different preferences, but the RX1 35mm lens does not seem to have very smooth bokeh and of course is a wide lens. It is also a fixed lens... something I would assume a DSLR killer would not have...
Having taken a live look at some cameras I noted following;
Sony RX1 --- Looks cute, but feels in hands like a lower priced point and shoot camera. Not at all feeling of a real camera in hands. There is no knob for setting shutter like on a Leica or X-Pro1. There is no viewfinder and an external one can be used, but it all adds to make tad difficult to determine where is focus on.
Nikon D800 --- Damn, you gotta be kidding me! What are people raving about??? I grew serious into photography with a Nikon F100 and expected the D800 to fall as well in my hands. What a disappointment. It feels awful in my hands, very poor ergonomics, tad like it has been put together very cheap and cheap materials compared to F100 was. Zillion of focus points in a very dim viewfinder, not at all for my preference for viewing when shooting an image. Yuck, and people argue this should rival medium format. Ha! I did not find Mamiya 645 AFD or AFDIII ergonomic, but they far beat the D800 to me.
Leica X2 --- Having had Leica M8 before and keenly looked at the X1 the other year, I had my hopes up
. I like the simplicity of a Leica and the menus are really great. Again, same as the Sony an external viewfinder, and the Leica optical clip on did not impress me; too small to view through. They had me look through the Leica EVF. My impression of it was: garbage, such lag and keeping me from seeing the scene optically infront of me.
X-Pro1 --- It is made of metal alright, but... very thin such... not what I had expected. However, I was blown away by the optical viewfinder, significant larger and brighter than I had expected, and the frame lines and other information looked very significant better than I have prior seen on photos; in fact it looked really great to view through it! When pressing the shutter, the EVF came in and displayed the image. I cannot say I like EVF (I do not... but...), but it worked seemless and very well to show the DOF used. The X-Pro1 feels very light... perhaps too light. But... the lasting impression is the optical finder, along with what is known to be a very exceptional 35mm standard lens with a very very smooth bokeh. And very high image quality indeed, straight from the JPGs. See my OP above.
I am not shopping, mere made what I felt was an interesting compare. If we consider that sensors will grow in MP, the Fuji do make alot of sense. A DSLR does not in my view. There we go... a DSLR killer...
Just my 2c