Actually, what is the difference between this and the Samsung NX10/11, other than the weather sealing and IS? Just curious, because I don't see any difference...?
I think Samsung has got a bigger sensor - APS sized.
First and foremost, I like the form factor and look of the OM-D. I also like the ability to modularize the camera from a small compact OM type size, to a near DSLR size with full grip and battery, or an intermediate size with just the grip alone.
The second thing I like is the weather proofing. It is a major thing and its one of the bad things of having the PENS now in that there is no weather proof. Weather proof for what, you say? Well....how about shooting IN a foam party versus shooting outside of it, just to name an example. And please note, even the flash is weatherproof!!!
Third is innovation. 5 axis IS, just shows how thoughtful the engineers are in Olympus. I would have thought 2 axis is good enough. Dun even realize that there are other axes to think about. They are trying to go for perfection, these Japanese people.
Fourth - World's fastest AF. Faster or as fast as the pro DSLRS in Canon and Nikon (as of Nov 2010). Won't you want to have a camera that is so small but can AF just as fast?
Fifth - Image quality and colours - Olympus has always been focused on producing sharp images with nice colours. In order to achieve this, there has to be synergism between the sensor, camera, and the lens. Big sensor, crap lens - bad photo - quite common in many of the other brands where the lens quality cannot even match the sensor resolution. If you actually shoot with Leica lenses, you will understand what Olympus is trying to copy.
Sixth - 9.5 fps. That is a significant improvement from 5 fps. Never felt the need for this since I do predictive single shots. But it would be nice for me, and I think for others, may be a big draw. Sony has the fastest now, if I am not wrong, at 10 fps.
Note : I also own Fuji cameras, panny lenses, and am also considering the Nikon D800. So do not think that I am an Oly fan. I just buy whatever that suits my needs or fancy, AND budget (very important) out there, irrespective of brand.